Research on here and subscribe to some youtube channels. Some helpful ones are G2 Outdoors, DIY Sportsman, NutterBuster's, Tethrd Nation, BoudreauxBoswell, Mark Dohring..... I could keep going lol. Since you already have a Mantis coming I believe these are the areas that I researched and addressed next.
1. Climbing method (How are you getting up the tree to hunting height)
2. Platform vs Ring Of Steps (this is what you will stand on at hunting height)
3. How will you carry 1 and 2 into the woods (If using sticks will you strap them to a pack or carry the bundle some other way)
4. Do you have a pack that will do what you need it to do (You don't need anything fancy as long as it will work for you)
5. How are you going to haul your weapon up the tree (Gear hoist of some sort, paracord figure 8 method)
6. If using sticks to climb how will you carry sticks up as you climb (I bought J hooks from doublesteps.com and tied paracord around stick standoffs to carry extras up as I go)
7. Knee Pads
8. How will you hang bow and gear when you get to height, G2 Outdoors has a great youtube video addressing this Titled
"The Ultimate Gear Hanger System for Tree Saddles"
9. Is there anything you want to do to cut weight or silence gear
10. Practice
I just went through this process a few months ago as I am just starting out as well. I hope this helps, it should at least get you started. If anyone sees anything I may have missed feel free to chime in
Happy hunting!!