LG G2 (D805) TWRP Difficult

Hello fellas, I have a LG G2 that had kitkat 4.4.2 before i start to try change the rom.
After read so many things here and there, i still have problems with the installation of TWRP.
Now i manage to put Lolipop 5.0.2 using the LG Flashtool 2014, because no other method worked, but i want to change for a clenaner one like cloudy or something.

But nothing works on my cellphone relative to TWRP. I made the root using LG One Clic.

I did the upgrade on the room couse I had no other choice and I decided to go stock on my cellphone…turns out that i downloaded a ROM suggested by SDK tool or another program from here (no sure) and it was a Lolipop not a kitkat as I thought it would be.

Now I want to know if anyone has an idea about how to install the TWRP so I can flash other roms easily.

—Autorec no worked;
—TWRP Manager says it doesn’t have busybox and dont have my model on the list, i think I should use d802 as I read around;
—SDK Tool not worked;

I have no idea what to do next. Please, help me.