1. yes probably
2. yes probably
3. TCX, MON, TOM etc
4. It depends on what discipline within 'Engineering' you want to do, you say you are not hands on, so are you in design, tech services, powerplants, planning etc etc etc
If you want to be a hands on licenced technician, Cat A or B, you will need 5 years experience to be able to hold said licence. Unless you go down the academic college 2 or 3 year course.
All the info is available on the CAA website in the safety regulation section, look for the ELGD documents.