adorable
“reading this post makes me thing that you can just do whatever you want and then do teshuva when you are done”
That is technically true. Hashem always accepts Teshuvah when it is sincere, however the mussar sefarim say or rather quote(I believe the Gemara says it first) that “One who says I will sin and then do Teshuvah” his Teshuvah is not accepted, but if one sins by accident or even on purpose because they couldnt control their Yeitzer Harah but regret it sincrely and did a real Teshuvah as outlined by the Rambam in Hilchos Teshuvah, then his/her Teshuvah is accepted 10000%