Not sure how im even supposed to beat a mission that has ??? Level Enemies and their immune to starting weapons.
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Your character was created quite a while ago when the Red War Campaign was the starting point for the Destiny 2 journey. Since you haven't played since then, you still have the Damaged equipment (which has 0 Power) for your armor and you have no Power weapon. Due to this, you're considerably under-leveled. If you have access to things from your Collections (as dc213baseball mentioned), you can do so to try to raise your Power Level until you can collect equipment. If you do not have access to anything from Collections, you have 3(ish) options: 1) You can delete the character and start again. 2) You can try to run through the starting areas to get to a public space where other guardians are at and be near them when they get kills so that weapons/armor engrams drop for you. 3) You can get a friend or community member to help you out to make the trip safer until you can get to an area where kills can reward you with some drops.