[mothered]

I don't really know yet what I want to SE (I will adapt my choice according to your advice) t shirts, polo shirts and potentially some sweaters, pants and underwear.

Do you wish to SE the lot, only a few Items or just the one?

Based on your experience, how much of which products could I get refunded without a problem on these different websites?

I couldn't tell you without knowing the store you'd like to SE.

And no unfortunately it will be new accounts

I strongly suggest making at least one legit purchase.