Question

Where to start learning math as an engineer with only field related knowledge of mathematics?

Answer 1

I'd recommend "Journey into Mathematics" by Rotman as a first step. The purpose of the book is to introduce the reader to proofs via interesting mathematics. The preface explains the philosophy of the book, which is different from that of Hammack for instance.

Answer 2

Hey fellow engineer, I learn math from math for physicist, or math for engineer type of textbook. It cover a really large range of problem (although non-in depth), which give us a good introduction before tackling physical problem that require that math.

Answer 3

Paul's Online Notes is recommended a lot on here. Would give you a fairly structured path, and you could start wherever you wanted.

Organic Chemistry Tutor is good as someone else said. You can search his Youtube channel for calc/geometry/whatever.

Answer 4

Nothing will beat practicing actual questions but to really lock down some concepts videos sometimes help.

My recommendation is go through the Lord 3blue1brown's lockdown fundamentals series, then his essence of calculus. Other YouTubers like blackpenredpen, Dr. Trefor Bazzet, minute physics, etc are also great.

Practice reading through a textbook's explanation of a concept to understand something, it personally took me a while to get my reading comprehension high enough to understand some of the "math jargon" used in many textbook's but learning to teach yourself is a big step in mathematical maturity.

Good luck OP!