Since you would need to retake 12th grade, I assume your 2-year certificate is not equivalent to an academic diploma from secondary school - or, do you have that?
I’m wondering whether you may be able to first move to a low cost of living European country (mostly in Central Europe) and complete a program in English before you use that credential to get into a reputable university in CS or Informatics.
French and German higher education programs are free but you need to speak either language very well.
Free programs in English are rare and would be more likely in countries where the language isn’t very commonly taught abroad (ie. Finland, Romania, ¨Cek Republic)
Quebec has a “transition college” for 2 years. Most students are 17-21, but a significant percentage are adults who are retraining or getting advanced training. Some of these are in French, some in English. These colleges would offer a 3-year certificate that would reduce time to receive a BS if you chose to go that route, or would make you eligible for a job&application to permanent resident status. For your best shot you’d have to be willing to go outside the main population centers, especially to Northern colleges, but I don’t know if they have programs in English 