I have re-started my interested in the hobby again but I am having a hard time doing so because I am not sure of period of time and places that I would be doing mainly both ww1&2 and the fact that I will be doing ww1 germens but not ww2 germens should I do these figures or not ?

There are no rules, so do whatever you want! I'm back in the hobby after 40 yrs, and this site has a bit of everything that simply did not exist 40 yrs ago. Join in the fun!

Marc,
Welcome back to the hobby! Lot's of good, knowledgeable folks here to help with everything!

Gaz

Marc,
Welcome to the hobby and Aeroscale. You're really going to like it here.

My advise is just to start off with a subject that really interests you. Work on the basics 1st, and when you're satisfied with the level of your builds, you can kit it up a few notches at a time.
Joel

Welcome Marc. We all seem to take a 30 or so year break when girls, beer, and cars get in the way of our model building! Then we grow up and get back to building little plastic tanks!

Welcome back Marc - like you I just returned after work, kids, and life in general allowed me some time! I found that after such a long break the best subjects were ones that hold personal interest, are a little bit unique, and most importantly are fun!

Tim