If you are new, it is best not to play the game. Your going to have to buy and buy and buy. Don't get cocky and say that you won't have to, literally every buys on this game. It is basically a pay to progress game. I mean, unless you want to spend 11 months grinding for a Mech. 

But if you don't care and still will play, then listen to this. Always match the pilot you have with the weapons you are using. For example, don't use a sniper pilot and you have in it, rocket mortar implants and you are using the pilot for arc torrent weapon. I know a bunch of idiots who do that and wonder why they suck.  Use the sniper pilot, have in it sniper implants, and use the pilot on sniper weapons, such as longarm or em rifle.

Also,  don't spend your in game currency on dumb mechs like shadow, it's pointless. Wait until you get farther ahead in the game to buy that. Also, don't waste your acoins trying to upgrade the mechs you already have, I mean,  unless you have insane good mechs. But if u

You are using like lancer, slingshot aries, mechs like that, then don't use your acoins on them, save up and buy better mechs.

Hello! Paying in Mech Arena is optional. It speeds up one's progress and provides early access to the novelties, but it doesn't guarantee winning. Although the comment above states that you have to pay, it's not obligatory. Sure, if you want to have the best Hangar in the shortest time - the best way is to spend, but with some patience and effort, you'll have a chance to get everything for in-game currency,

But the main idea of the game is to have fun. It's up to you how exactly! 😉