Returning player looking to play a beginner friendly tank for mostly pve content

Returning player looking to play a tank and was wondering which is the most noob friendly?

So even tho i am getting the bolster buff it is lower than someone without expertise in their gear?

Hi, i just returned to the game and plan to play my sniper who is now 50 and level thru warzones. I have been doin some readin about bolster and saw that i need to replace all my level 50 pvp gear that has expertise on it so i was wondering what gear is cheap to buy that can replace my old pvp gear? Thanks

Also does everyone think MM is better than lethality for pvp?

Also another question, when I am defending nodes and 1 people from the other team comes it seems like I always die because I lack mobility, how do I defeat this problem?

Hello fellow snipers, for MM pvp I was wondering if anyone could help me with the rotation because when I was MM my damage in WZs wasnt that great? Also, should I just stick to lethality or try MM again? Thanks