First of all, you should go as lightweight as possible.
To find out whats possible for you, it is a good idea to think about what you want to do. Enjoy a trail an entire hiking season, doing 10 miles per day or less? Or find your limits in distance you can cover per day?
Go as sustainable as possible – you know, in todays world you need to be aware of these issues, otherwise you risk to make Greta angry and this leads to bad luck and therefore a bear may snap you right in the rear.
Don’t buy “beginner” gear or gear because it is cheap. If short on cash, have a look at used gear or ask your friends. There are 100 thousands of highest quality backpacks sitting in a shelf somewhere, waiting that they see the light of the day.
I do not recommend any gear.
Try out as much as possible before getting stuff. Buy as local as possible and avoid big brands as you support a questionable business systems. The wo:men who sew the things together in the south could never afford the stuff. This is wrong.
Buy from the local cottage shop and you get better support for free. A good place to start in the US is here.