HaNaGiS take some baby steps... aim for 1100 first before 1200.
get comfortable in 1100 and the work your way up to higher goals as weeks progress. eventually you will find getting to 1300 to be quite easy.
you have a big enough collection that you should be able to get good ELO
scores most weeks
playing conservative is usually better than playing aggressive in ELO
(obviously depends on the hands) but generally aggressive players often get punished hard in later rounds.
keep an eye out for games that you have locked in for a 100% win. at first this is hard to see... but eventually you will see that by round 3 a lot of games are already won, it all depends on how you pill. dont lose these games. you will then start to see that some games are already over right after round 1.... a bit harder to spot, but again, these games are out there --- try not to lose these ones either
there are also games that are basically 50-50 coin flips.. a round three play --- where it is either a bluff KO attempt or a real KO attempt... DONT BOTHER wasting any time thinking about this. It always amazes me to see people taking their time in situations like this. none of us are psychic. It is either a real attack or a fake one... no amount of thinking changes what your opponent did.... if you get it right it because you guessed right (it doesnt mean you are good, it doesnt mean you are bad). Put these kinds of games behind you and just hope you win 50%+ of them.
Finally.... play as many of the clans as possible. This is something that can only come from experience. You may know that cards, you may understand the cards, but until you play them... you dont really know how they deck plays.
So when you get frustrated cause you are constantly having a hard time vs mono Clan X or split deck Clans X/Y. Play those decks that are causing you problems.... soon you will see what kind of problems those decks face. Once you understand what each kind of deck has problems with, you will know how to play against them.
goodluck. and trust that you will improve.... everyone starts new in ELO
at some point. winning 50% of your games in ELO
is enough to get you 1200... but dont aim for that... aim big and cruise to 1200 (or higher) ELO
in style by getting there in very few games (very few losses)