New player, feeling VERY discouraged

I've been playing for a little under a week now and it's super fun! But today I've hit my streak of 20 losses in a row 90 games played, 22 wins total. I'm trying really hard to get fifty wins so I can play the ranked mode and play with people around my skill level, but quick play is swiftly destroying my spirit. I'm constantly being matched with people with WAY more experience and time put in this game than me. They know all the tricks of all the characters, their counters, everything. But I still don't even know who all the heroes are and what they do yet. I'm trying my best to improve at the game, going into practice mode often, and even though I feel I'm improving, I'm still nowhere near as good as everyone else. I see that quick play has some hidden mmr going in the background but I don't think it's doing a great job lol. How do I get my motivation up, and more importantly, what should I do to try to be better for my team and start winning games?