First pens arrived today!

Hi guys, first time posting here. I started working on my handwriting a couple of months ago and it has inevitably led to fountain pens. I got these three vintage pens on marketplace for £50 (hopefully a good deal but I have no idea), and they arrived today!

I now need to get some ink and would love some recommendations. Inks to avoid would be great as well, I don't want to damage them.

If anyone has any information about the models that would be amazing too. If you need more pictures for that just let me know.