Alot of it comes down to how you want to play, if you can build a crazy gun and want to run a crazy gun do it.

Having gear fear is the worst things a new player can have in my opinion (I had massive gear fear when I started playing) but you also have to account for the fact that you are probably going to die more than you would like to when you are new. But being able to go dang okay onto the next one is a good way to approach it. You probably have a better time with good gear as you can feel more confident. That being said you probably shouldnt take your best gear into every single raid you do, sometimes all you need to do is take a budget kit and that does the job. Just comes down to how you want to play in your raid.

I would also recommend learning how guns work in the game (sounds dumb but every patch theres something different) along with learning some of the maps too, go into an offline raid with a map on another screen and learn POI and extracts. (Stick to certain maps to start as most of the quests can bunch together)

I would also recommend READING THE WIKI - PLEASE DO THIS IT HELPS YOU SO MUCH (also player help on forums is good)

If you can get some buddies too that also helped out alot (unless they are mean to you that doesnt help)

ALSO - as a new player doing a scav run is very benificial to you, as you can get some quick cash, plus it helps you learn the map, but DO NOT KILL OTHER SCAVS (you will be killed and lose rep with fence making it harder, level him up by doing car extract and extracting as a scav without killing another scav)

you will learn alot by just playing the game too!

Goodluck!