Hi as a newbie myself well, returning to the SPORT after 30 years away. I have moved from 1/32 scale armour that was my think back then to 1/48 scale planes. Just to get my hand back in again.
(will go down to 1/72 scale if my eye sight lets me.....lol)
I echo what everyone says go for something that grabs you.
Have a look around the forum at some of the models, that's what I did.
I now have a stash of F-104's the bird is hypnotic, if you want to build it right then research as well.
Also this forum is great the guys are so helpful and the tips are real good too.
Wish you all the best