Another graduated physicist here.
While i do think it's possible if you're not good at math, you will have to accept that in the first 2 years of your Engineering studies you will be doing more math than actual engineering or physics. My first year at uni (physics) we had 60% Math, 30% Physics and 10% other stuff, like electronics, mechanical engineering etc. So it's gonna be really rough on you.
The reason we are using letters rather than numbers is to learn to think abstract more. so if you use a mass of "m" kgs, rather than a mass of "10 kgs" it makes it easier. I get a solution which eg has the letter "m^2" in it, you get a number as result.
If then the teacher tells you to use a mass that is twice as big, i will know instantly that my solution will be (2m)^2 so 4 times bigger. You would have to do the complete calculation again.
Its weird at first, working with letters, but it really pays off in the end