lots of good arrows out there. 4mm is great but not necessary if you are a beginner. a great all-around arrow is the RIP TKO from Victory Achery. if for elk, I would suggest you target +/- 500 grain total arrow weight. you can add weight up front with inserts and impact collars (I recommend Iron Will). Many outfitters won't let you in camp with a mechanical. Iron Will fix blade single bevel is hard to beat. With a stout broadhead and a 500grain arrow, you can punch through a scapula if you make something less than a perfect shot.

as for releases, do you prefer thumb of finger? spot hogg wiseguy is a super popular finger release. several good thumb releases too. I shoot a Carter 4 finger grip.

hope that helps. lots of good gear on the market and you can find success with alot of different options..

I shoot the rip tkos also. One complaint about them is the outserts, they bend fairly easy. What I would point you to is a rip tkos with a hit insert and collar around that. Some shops won’t make them but that’s what I’m going to run if I get a tag this year