I would say be patient. You won't start with good gear and will take a while to get to LvL 20 when the game really opens up and the gear drops increase greatly. (Quality, not necessarily quantity)
The MP can be played at any LvL and everything is leveled so you can go in there as a LvL 5 with shyt guns and you aren't penalized for it or getting rocked just cause someone else is LvL 27. It will come down to skill and my maxed out Exotic Hand Cannon Thorn is really no better than your LvL 16 hand cannon....just whoever can wield it better.
Once you hit LvL 20 it is all about getting the best armor and guns for the PvE modes and the Iron Banner, which is an MP arena where your gear and stats do matter. Better guns and armor win in the IB, theoretically.
It is a fun game, might seem tedious in the beginning, but as you play thru it, do all your bounties you can to speed up your leveling up, you will find yourself doing nightfalls and raids (where the best loot comes from) in no time.
If you on PS4, feel free to add me. I got a lower level Warlock I could run some missions with you on and help you get up to speed.