Advice #1:
If youre stuck between buying one hero or another, al ays invest in dps first
#2:
Prioritize leveling up every character to 5 to get as many chests as possible and increasing the chance of getting heroes this way. Aram gives you a broad spectrum of heroes without owning them but its not a great place to be when youre a beginner
#3:
Always look to complete your daily quests. They all refresh every 3 days so you will have a good window of time for one playthrough every 3 days
#4:
Encourage a friend to come along. Theyd ideally have to enjoy progressing through the game the same way you do. The game is much more fun when youre with friends.
#5:
Conserve your gems as much as possible. Dont spend them on any cosmetic as of now. Until youre satisfied with your roster.
#6:
Try to familiarize yourself with at least one hero per roll category. Tank, dps, healer, bruiser. Support is only optional.