Too many choices...

Mass Effect boasts one of the nicest playmodes ever in Narrative. As well as lots of autosaving features. Making the ability to revert any bad last second choices rather painless.

Find what you like and work with it, are you a soldier? do you want abilities? do you want to run and gun? do you want to be sneaky and head-shot everything? fisticuffs style, with a little bombardment (lots of grenades)? "construct" abilities, like turrets and artificial AI's to serve and protect?

I was a little overwhelmed with the amount of researching you can do, don't know you can craft levels 6-10 until you research the previous 5 levels

If it's your first time playing, find what you like, run with it. Make an extra save file in case you didn't like an idea you had. If anything, this game gives you absolute freedom to try anything out Good luck!

Edit: I find Heleus equipment to be the most powerful across the board, I believe it even states it. Remnant is more on the wonky side I feel, with the chance for great potential under the right circumstances. And the first tree is just to me, ME trilogy fanfare all the N7 gear, yeah!

If you don't play on hard difficulties, everything works well I find. It's just up to you to find and adjust what you like and want to see yourself do!

I did my first play through with a P.A.W. equipped only as a weapon, upgraded levels when I could, adding more and more mods. Heleus armor I researched, currently at level 8 out of data (Helmet too, no need for leg or arm armour), I also researched the Remnant armour up til 9, and found out Heleus kept me alive better fighting Architects then Remnants +health regen.

Now just for nostalgia I guess, I do my best to put ONE point at least in every research available. That way... I can see what it's like in it's simplest form!

Again, good luck finding what you like, I hope you do