Lineup/Superstar Ability Advice?

I've been mostly NMS just picking up cards from challenges and flipping some cards on the auction house to get my current team https://www.mut.gg/lineup-builder/527c4da9-c12b-45d4-a8e0-e58f036182fc/

I am totally lost as to what to do for superstar abilities, and honestly against people online I don't know what the best playbooks or strategies are at all so I get completely rolled. I use the Eagles playbook on both sides of the ball for now, that's all I have from the beginning of the year. 

I'm more than open to selling any players I have to change up the lineup, I currently have about 150k coins and could sell a lot of cards in my collection for at least a few hundred more thousand. 

Thank you in advance!

Also if there is a starter guide for this kind of thing, I apologize. I'm coming over from Muthead and this is my first time here.

As far as playing online i couldnt help with that, i get rolled too which is why i dont play it, if ur not on the discord channel, join that and try to win the gameplan giveaways they run on tuesdays, that would be a nice guide for ya………as far as ur team, i would say trying to upgrade ur LB corps and LE are priorities and also get the power ups for as many of ur players u can and power them up as well

Do you have a link to the discord? I'd be happy to join, I'd love a gameplan giveaway I'd even be down to pay if it's not too expensive. 

Do you have any LBs or LEs, in particular, you'd recommend? I'll look up which of my cards have power ups and try to get those as soon as I have my lineup a bit more optimized, I don't want to get power ups then get told some of those cards should be replaced you know?

https://discord.gg/mutgg

First i would say level up and get the free nick bolton for starters……Dont know what your budget is like but if you can afford like around 100k per player then u could get like deion jones, myles jack or ray lewis as ur 2nd MLB, then u could get like bradley chubb or the joe thomas as ur ROLB and Clay Matthews or Von Miller for LOLB…..as far as left end you could get like ed too tall jones, jermaine johnson, jevon kearse or dayo odeyingbo

Hey I just joined the discord, do you know who in particular does the gameplan giveaway on Tuesdays? I was hoping to reach out and offer to pay them for a gameplan if possible, I'm having trouble finding anything similar online. 

Thank you again for the helpful responses!