Mother is adamantly against me marrying my gf of 4 years

Background : my (26m) family is from a pretty conservative family which is the case for our extended family as well. what this means is basically they impose a curfew on me of no later than 10 p.m. which is wtv until i reach 20 years old where lived with a few friends at a dorm. I was culture shocked as I could go party and hang out with friends until whatever time i wanted which was extremely liberating.

Now around this time I made a couple of bad choices which eventually lead me to crash 2 different cars within a span of 3 years. Reasonably they lost trust in me and when I had to mave back in with them (cultural reasons) that curfew is stuck in place.

I met my gf when I crashed my car (23 yo at the time) for the 2nd time (i was driving) and she was in the car with me alone. It ended up being a pretty serious accident and the car was totaled. At this point i got my life together finished my degree (24) and finally got a decent job this year. Previous 2 jobs that i had was an entry level job.

I’ve been wanting to bring my gf over to meet my parents for the past 2 years of us being together but they were always giving excuses to avoid the situation without outright saying that they do not like her (keep in mind they have never met her before). I did talk to my dad and he was resigned to it so now I need to get my mothers blessing🙄

Another reason for my mum’s reluctance is that an uncle saw gf & I smoking cigarrettes and showed them to my mum in the most shitty manner you can imagine

Please give me advice on how do to approach my mother at this point because it honestly sucks..I was never close to my parents before and the advice i got from my siblings is to wait for them to come around.