Strange thing about this game is that I thought I was ahead after cutting off the white stones with 187.
I went over that game but I can't see what I could have done better, except for cutting sooner.
Well I do think after I have 3 weak groups, that is bad but I didn't know what to play. I also played with the idea to attack the white k3 stone, but that didn't turn out right.
About : I tried something new and I didn't know what I was doing.

Please tell me what I could have one better from fuseki to yose.

Few thoughts about the top right corner before I sleep. After you force him to connect with 17 , feels far to nice for white.
After that I just skimmed over the rest, you are just jumping around the place to place like some kinda grasshopper before settling. You were fortunate not to have your legs torn off by some kid

A few comments:

The sequence 9-18 does not look like a good strategy. Locally the B corner is perhaps comparable in value to the white wall, but more globally, the B stone at R10 has been significantly devalued.

strikes me as an overplay, asking for trouble. Your two stones on top are too big to sacrifice, even if you get the corner in compensation. So it makes more sense to stabilize these stones first, then wait for an opportunity to invade the corner. If W uses an extra move to secure the corner, so be it.

is exactly the same, asking for trouble again. I think it would be more prudent to stabilize the left side group instead. This is particularly important, given the other unsettled B group above, opening possibilities for a W double attack. After the sequence to the four B stones on the bottom are more of a liability than an asset.

is a golden opportunity to solve some of B problems. Why connect these two worthless stones? Cut at K2 and secure one group right away.

The exchange 61-62 shows that B is still not worried, despite now having three weak groups!

Not much comment on the rest of the middle game fighting, except a few notes:

at b6 would be a good whole board strategy -- force this B group to run, in order to consolidate UL territory while attacking. I think B would be in trouble.

is ugly, e14 is better.
and are small.
:w106: was sharp, game winner.
:w152: was small, :b153: much larger.
:w160: to :b163: helped B.
:w166: to :b169: was a blunder, permitting the cut at L5.

Thanks sekoj and mitsun!
I now feel so stupid to have played like this, but now that I know my big mistakes - I'm sure I can do something about it, but that'll take some time and effort

Hopefully I can post another game with different mistakes in a few days