
First of all: I'm a Free2Play player, so I DID NOT SPEND ANY AMOUNT OF MONEY ON THIS GAME.
So i'm a new player, today it's the 60th day in my account, i started playing around when the GotG Vol. 0 Started, and i fell in love with the game, fortunately i searched stuff to help me in the game and i found Seatin's and Brian Grant's Channel that helped me a lot, so i began my arena grind pretty early in the game.
in these 2 months i have gotten 28 4* Champions, 2 5* Champions, 44 3* (only 2 maxed) I got every Basic Champion since Mordo (Except for Joe FixIt as i didn't even grind for him)
And every single featured since Yondu.
You can see all of my arena history scores here

:
http://imgur.com/a/SAQoB
Ended with a PI overall of 89k
Done Act 1 at 100% Act 2, Act 3 at 100%, completed Act 4
http://imgur.com/a/FWk3l
And i even beat Realm Of Legends during the WS Arena
http://imgur.com/a/m58G8https://www.reddit.com/r/ContestOfChampions/comments/6k573j/realm_of_legends_done_in_less_than_2_months/
I hope that if a new player sees this, this can inspire them to achieve their most out of their 2 months in the game, use the arena system, it is designed to push you on your early game, you can get every basic if you want to.
Advice i would give you new players:
1.- completing act 1 at 100% is a good idea, this is true also for act 3, as you will get a 4* out of it, i would not bother exploring act 2 however, also explore medium difficulty for monthly quest if you can to get a free 3* champion each month.
2.- Grind arena as soon as you can, if you can't get a 3 star champion, grind the Summoner Trials arena, you will get PHCs for free, hence more chance at getting new champions and new 4 stars, i opened at least 20 phcs per week, and i got my first 3 4* from PHCs.
Also, if you don't have enough time you can get at least 6 4* in those 2 months from the basic arena.
3.- Once you have some 3 stars, don't be afraid to grind the 4* arenas, even if you don't get the basic or featured champion, it is highly important to get shards, if you hit the 11-20% rewards you will get 4 4* Crystals over 8 weeks, plus 3200 5* Shards from the basic arena, add in the 1-10% from featured arena you get another 5 more 4* crystals and 4800 more 5* shards over 6 weeks.
ALSO NEVER EVER BUY CRYSTALS GUYS! USE THE UNITS FOR MASTERIES! and also to buy refills to get those arena points if you want to get a champion.
So that's all, i hope i can create good content to help new players as Seatin, Brian, Dave, and Joel helped me, and i really appreciate it and thank you guys.
And if someone wants help or something you can hit me up In Game and i'll gladly help you

.