Hey to anyone reading this

If anyone could offer some advice I'd be thrilled! So, around 8 years ago, I first picked up interest in Warhammer
40k. The issue was that as a 10 year old, I didn't really fully understand the rules and how everything worked and I never played a proper game of
40k. My first set was The Battle for Macragge box set, and I also believe the Assult on Black reach set as I loved space Marines and Orks, I still have my models from both sets as well as some others. Other people are judgemental, and I'm quite a reserved guy so I guess that's why I lost interest as high school wasn't easy - people can be jerks man! Anyway, I was looking at potentially getting into the hobby again, but I don't really know where to start. I love the idea of collecting a Raven Guard force, and I'm open to ideas, collecting a small force of more unique models as a side hobby for spare time or just relaxing.
I recently popped into my local Games Workshop store and to be honest it was a little bit overwhelming, I don't feel as if I fit in with the whole community - that's not me suggesting I'd be above it at all as I'm really interested, but I feel in a slightly different crowd if that makes sense! I don't mean to offend anyone it's just I'm not massively familiar with the
40k community, and my brief experiences haven't helped
Sorry for the long winded story, thought it may be worth explaining! Like I said, I'm practically totally new to all of this so if anyone could lend a hand that would be cool! Anything to do with what I should do with my old models or where to start, anything would be appreciated!
Thanks all!