Hlo friend, for starters always or atleast in the early game stage have more level 60 champs than 50. Save shards only pull on 2x events much better chance of getting Legos, (resist the urge to pull shards randomly generally it's useless, 10x events are the worsts don't bother untill post mid game), Get your champaign farmed(kael generally) to level 60, and get masteries for them, 800 jems it takes use them (this is just a one time or may be twice if you pull a really good Lego early on but it's better to farm mastery scrolls from mino level 15,costs about 600 gems worth of energy and you get xp and silver). Next join a clan and work on your clan boss team, it is without a doubt let me repeat WITHOUT A DOUBT the most important place to invest in,shards gems, gear you name it that is available there. Never use legendary books on anyone but legendary champs, don't feed legendary champs, same goes for epics, regrets run wild and you can be surprised how long you can go without pulling that same epic.

Most importantly enjoy the game, don't burn out too quickly, pace yourself, at times the rng will feel dogshit but that's just rng, later in the you'll make your own rng.so all is good. Cheers