Hi TPE.

I´m new to the forum, and this is my first post. I have played poker for a while, but now i´m getting more serious about it and want to improve my game. Hence the reason i signed up to this site. English is not my first language, so excuse me for any mistakes 

I know I made mistakes in this hand, and I´m aware that I am not a great poker player (yet, hopefully), so feedback will be appreciated.

This was in a €5,50 1R1A €5000 GTD tournament on a site called Guts, which is mainly used by scandinavian player i think. It was in the early stages, and there were no re-shove stacks or anything like that preflop.

We were currently 7-handed and the blinds were 30/60, with no ante.

Preflop:
Villain from UTG+1 (stack 4715) opens for 120
CO (stack 15632) calls
HERO (stack 8013) calls from the small blind with J8.
BB folds

Now, I´m pretty sure calling in the small blind with J8s is a mistake, and I don´t really know why I did that to be honest. I don´t know if it´s the end of the world, considering it is a suited “connector”, getting a decent price and not too worried about the big blind squeezing unless he has a hand. But a mistake nonetheless. Also, if this were a full ring table I would fold. The table was generally kinda loose, so I did not think that villain had to have a very strong range to be opening from UTG+1, especially when we were 7-handed.

Flop: K4J (420)                                              
Hero checks
Villain bets 210
CO folds
Hero raises to 644
Villain calls

So I flop a pretty strong hand here. And I didn´t want to check-call OOP and then be in a wierd spot if the turn bricks. I also thought villain was going to c-bet almost 100% on this board, so I do expect a decent amount of folds when i check-raise. Which is fine, because I don´t think i´m getting value from worse hands anyways on later streets, and I could potentially fold out something like KT, although I dont really expect a king to fold just yet. 

When i look at his calling range, which I think can look something like this: KT+, KJ, all sets, AT and AQ of spades, AA, maybe something like AJ with the A, and maybe even something like QTs:. I have about 45% equity against that range on the flop, so getting called isn´t too bad? And I can probably fold out some better hands on later streets. Some of those hands in that range probably get 3-bet some of the time, but I still think it is a reasonable range.

Turn: (K4J) 5 (1708)
Hero bets 877
Villain calls 

I wanted keep barreling here, maybe fold out some kings and maybe an AJx. And if he had something like QTs, I dont want to check and face a bet. Although he probably does not bet that. I have about 30% equity on the turn against that range I mentioned earlier, and I expect to get some folds from better hands

River: (K4J5) 2 (3462)
Hero bets 1799

At this point I still think he can have a single king (KQ, AK) which I think I can fold out. Also If he had a big draw like AT or AQ of spades he would have to fold now. And I know I´m beating that, but if I check and he jams that as a bluff, I have to fold. Maybe something like AA fold here sometimes too. I still think he can have sets and KJ on the river. Some may say he would 3-bet flop or raise turn with those hands, which may be true. But a lot of the times I think he would flat IP and let me barrel off. I realize now, that I rep a pretty narrow range of value hands here on the river. Something I did not really think about during the hand. I guess I´m only repping 44 and KJ, because I would 3-bet KK and JJ preflop. And maybe exactly A3.  And of course the FD missed which villain might have put me on. 

Also, If I was going to bluff river, I should probably shove, seeing that he had about 3000 in his stack with the pot being 3462 on the river. 

So I might be totally off with ranges and stuff, so I would like some feedback. It´s kind of new to me to really think though some of this stuff, and like I said earlier, I didn´t really think about some of it during the hand. What value hands I can have on the river etc.

Thanks!