Job advice and life...

I have a opportunity working at this full time to be a senior pharmacy technician making 25$/hour but that's within a year I'll be starting out at 12$/hour ---thats just one---

I also work already at a department store as a cashier making 10$/hour but I dont want to leave there until after Christmas.. on top of raising our 4 kids ...

** but the first job is part time right now but willingly going full time Monday-Friday *not working absolutely NO weekends*

And the department store I need to work weekends-! But I'm trying to work there only on Saturdays--'

And raising our kids plus training our dogs etc. (Life etc)

I'm really nervous to be starting as a technician but i want to do this and finish a promise that i made to my grandmother as she recently gained her angel wings-- so pharmacy has a meaning to me.

Idk ladies please give me some kind of advice.. my boyfriend is supportive of this but I just need advice

Thanks

** some may not understand the concern or issue but its generally a lot 40+ hours so that's why I was ASKING for advice only*