Title has it all,

My spouse had a surprise pregnancy right before the divorce. The child is mine, and i’ll take full responsibility.. though I want out of this marriage, that’s for damn sure.

Context: - Married 4 years (Texas) - this will be a first child for us both - spouse works part time, makes next to nothing - I work full time, salary is a little over 100k a year - counseling is off the table. I no longer want to be with this woman - drunk make up sex happened one night, which caused this “surprise”.. my spouse has infertility issues, so it was completely off guard - I want primary custody of the child. I’m not sure how hard it will be, but I am definitely the one who’s better off financially - I’d appreciate info on how hard/challenging it is to co parent

Thanks in advance