Serious advice: Make sure this is what you truly want, and don’t have unrealistic expectations. You should understand that although you will come out of the mikveh with a new and holy neshoma, you will not feel any different. Your yetzer hara will be just as strong, if not stronger, and it will be no easier to resist.
It’s like ne’ilah on Yom Kippur; you think that with a blank slate and a new start everything will now be different, but by Sukkos you realize that it isn’t. For you it will be a true blank slate, because your previous averos will have been completely erased and will not be your problem any more, but the yetzer hara that grew on those aveiros will still be there.
Remember the way the gemara phrases the instructions to a would-be ger. It doesn’t say to tell him, “Be aware that yesterday you could eat cheilev and tomorrow you can’t”. Rather it says to tell him, “Be aware that yesterday when you ate cheilev you were not punished with kareis, and tomorrow when you eat cheilev you will be punished with kareis”. In other words we expect that you will do aveiros, and you have to accept that as a result of your decision you will now be punished for them. Basically you’re signing up to go to gehennom. But if you accept that, and would rather be in a yiddisher gehennom than in a goyisher gan eiden, then welcome, welcome, welcome.