Sorry to be wet blanket but I can't imagine how she can undertake sponsoring of you when she's on student visa and working part-time.
She's not allowed to work for more than 20 hours/week and I can't see how she will be able to maintain 2 people from part-time salary with the current prices for goods and rent etc.. in UK
This is definitely NO NO...
Good luck to you in fulfilling your dream
And welcome in here![]()