Lern monster behavior. Back in FU I'd just go in with fucking nothing and see how long I could last without running away or dying.
This helped me learn how to know when to dodge and when it was good to attack.
Ultimately if you know how a monster behaves, you'll know how to avoid everything they do, which is completely possible.
This is all optional but ?I think learning monsters is a good trait to pick up.
Secondly, and probably the more practical for a new player is to just get some good gear.
MH games have mostly relied on having a bigger number and better gear/skills. You will ALWAYS need a better weapon at the bare minimum.