Take your time, make friends! And enjoy! Its very fun game with a fun world! Class's wont matter as much as you think, learn the game slowly and ignore the cancerous kids that cant process change in this community Join discords to make groups, destiny LFG and the destiny app
And whatever anybody tells you, you do not have to purchase silver in order to get everything, it may increase your chances, but so does actively playing the game.
Take the campaign slow, absorb the environment and the lore, enjoy everything. If you try and rush through to the end, you'll get there REAL quick so just enjoy everything. Oh, and like Steven said, IGNORE THE FUCKING COMMUNITY.