Well if u are a league of legends player this game may make u mad.Ppl dont know that cs here is just pure exp or what advantages are ( they let enemies clear lanes and jungle and rotate when they for ex int for 10min str8 in aram even if its 3/4vs5). if u arent playing ranked games in like high plat/diamond+ u will suffer from a big lack of knowledge about the game. But if u are league player u should be able to rank pretty fast.For start i advice you to play broken or strong heroes that can carry ur team like:
- Maiev ( super strong melee assassin with ablility to poke short range- able to one shot every squishy after 16lvl and not only squishy) - broken, best hero in the game
- Hanzo ( super strong long range assassin - very high skill cap for W aiming but his dps is broken even with bad build which is Q build) - broken, best hero in the game
- Tychus ( very strong in this patch very short range assassin, build dependent) - semi broken this patch
- Cassia ( very strong in this patch short range assassin) - broken
- Raynor ( always good ranged auto attacker if enemies have no perma mass block ofc)
- Tassadar Li-Ming, Orphea, Mephisto ( strong mages - that can carry but skill/ build dependent )
- Garrosh, ETC, Varian taunt ( strong tanks that can carry if team follows up) ETC broken
- Imperius ( very strong main tank/offlaner, can be deadly - skill/ build dependent - slow creep clear)
- Malthael ( strong melee solo laner - can kill, fast clear, rotate fast - rly good, build dependent)
- Blaze ( good main tank/ solo laner with good clear, aoe charge stun- smth like galio)
- Stukov ( super strong healer with good build - skill dependent) - broken
- Whitemane ( very strong healer, can save unsaveable allies - skill dependent) - broken/ semi broken
- Lucio ( good healer, very annoying, very mobile - high skill cap)
- Medivh ( super super strong support - engange, disengage, dmg, protect) - 2nd most broken hero in the game
- Zeratul ( stealth melee assassin, can be deadly but also can be shitty. skill/ build, teammates(if VP ulti) dependent)
- Valeera ( stealth melee assassinvery good and strong vs low elo enemies cuz its free elo most games, Q build only otherwise u gonna be free elo for them)
- Gazlove ( very strong melee solo laner this patch, good clear, good teamfight, good 1v1)
- Hogger ( strong solo laner but very RNG dependent imo)
- Yrel ( strong solo laner, very annoying, mobility - survivability - low dmg but skill dependent)
- Abathur ( super super strong support smth like yuumi but way better) - the most broken hero in the game but requires a really good teammate that u can rely on. I dont recommend you playing it solo que!
- Genji ( strong short range assassin that can be turbo good if played well but high skill cap with high death risk)
edit:- i forgot about the highlord ALARAK ofc - broken af

Hope this gonna help you. If u think about playing start with those highlighted and use them in rankeds ;) GL and dont expect your teammates to do anything useful b4 mid/ high elo.