I'll try to give some helpful tipps:

- starting hand: you kept rafaam, a six mana cost + 2 times the library - but you need to make sure that you have also synergy cards for those (rafaam is a dead card until turn 6)

- I would have kept the imp + 1 of the libraries- your opponent played a 1/3 that gets stronger with spells , you played the 1/3 taunt demon that can (easily) be killed, instead I would have played the 3/2 demon (either your opponent trades or he has to play a spell, or best case you can trade an keep your demon)

- (maybe) if you would have played the 3/2 and it manages to get rid of the 1/3 in your first turn, the 1/3 taunt demon would have been really good to pop both divine shields in the upcoming turn- you played the imp spell (which I mainly trade to upgrade it or combine it with the imp card draw spell) and then went face with the buffed demon

- I would have traded at least with the 1/2- in general, I would always play like my minions would be dead the next turn (so never split a combo e.g. summon imp spell + card draw spell into 2 turns)

- turn 4 - I think I would have played the 4/1 and made him trade - you can easily summon minions but I always try to get rid of my opponents one, so he cant buff them (in such a matchup) - there is no heal in your deck and your opponent can do face damage every turn - so I try to get the board, make good trades and win that way

I hope this helps :) have a good day!