All your sentences are grammatically correct. Which form to use is mostly a matter of style in the given context.


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Note added at 2 hrs (2022-04-07 00:20:27 GMT)
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And yes, your sentences have the intended meaning.

The 'would' in repeated or habitual acts in the past is grammaticized. I bring the following lines of Otto Jespersen (the book reference will be below):

"Further 'would' denotes repeated or habitual acts in the past, chiefly such acts as are consequences of the subject's nature or character ([...] in the preterit it is found in all three persons; the quotation from Dickens shows various synonymous expressions).
[....] 'she would hang on him, as if encrease of appetite had growne by what it fed on' [...] [Goldam] 'the Squire would sometimes fall asleep in the most pathetic parts of my sermon' [...] 'On Saturday Mr Dobey came down; and Florence and Paul would go to his hotel, and have tea' [...] [Stevenson] 'When I would come back from these excursions, I was often plunged into a kind of wonder' [...] [Aumonier] '[every time when she was sitting to a painter] they spoke very little till the work was finished, when a man would bring in a trav of tea-things' [= and then...] [...] [Ahuxley] 'every twenty miles or so, we would catch glimpses of a thing which seemed, at first, only a white cloud' [...]
In a conditional clause: [Bentley] [...] 'If he was having one of these rages in the library and Mrs Manderson would come into the rooom, he would be all calm and cold again in an instant' [...]".
(Modern English Grammar on Historical Principles, Part IV: Syntax, third volume. London. George Allen & Unwin LTD. 1932. Pages 303-4 [topic 19.1(6)])

Regarding your whole work, you should keep the 'would'. We assume that in your source material this kind of sentence has always the same structure, so you have no reason to switch back and forth from 'would' to another structure.

Yes, your questions are really about basic grammar rather than translation.

First of all, it is OK to vary the tenses but it really depends on the style you want to achieve so, unless you are expert, it's better to keep it simple.

Oliver has given an example sentence with "would" but unfortunately, it is not very idiomatic

"Then he would wash; then he would eat his toast; then he would read his paper by the bright burning fire of electric coals."

In idiomatic English that would be: First he would wash, then eat his toast,(and) read his paper by the fire.
"fire of bright burning electric coals" (really not correct)

Would is NOT always interchangeable with "used to"

It cannot be used for a state

Also, unlike "used to" it must have a time frame established

e.g. I used to smoke (already clear it is in the past and you no longer smoke)

When I was younger, I would smoke a pack of cigarettes each day (habit at that time)

To summarise, as the link below says:

"... the use of "would" is more restricted than that of "used to". Therefore, if you aren't sure which one to use, it's best to choose "used to."

https://www.britannica.com/dictionary/eb/qa/the-difference-b...

examples of characteristic actions

My grandmother would always spoil me whenever I visited/used to visit her
OR
Whenever I visited/used to visit my grandmother she would always spoil me

Back then, he would always have a glass of sherry after dinner

She used to love playing with her dolls
When she was young, she would spend hours playing with her dolls (a characteristic habit she had at that time)

Habitual actions in the past

We use would to refer to typical habitual actions and events in the past. This is usually a formal use and it often occurs in stories (narratives):

I had a friend from Albany, which is about 36 miles away, and we would meet every Thursday morning and she would help us.

Then he would wash; then he would eat his toast; then he would read his paper by the bright burning fire of electric coals.

Warning:
We can’t use would in this way to talk about states. In these cases, we say used to instead of would:

I used to live in Melbourne when I was a kid.
Not: I would live in Melbourne when I was a kid.

Source: Cambridge Dictionary
https://dictionary.cambridge.org/us/grammar/british-grammar/...



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Note added at 2 hrs (2022-04-07 00:10:29 GMT)
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In my opinion, switching back and forth between those three verb tenses can be confused, not necessarily ungrammatical. It all depends on your specific context.

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Note added at 1 day 4 hrs (2022-04-08 02:05:41 GMT)
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Correction: can be confusing...