If you have a passsion for Aircraft and Maintenance then don't stop at nothing too achieve your goal, no matter how many times you may stumble or struggle. But you must ask yourself, " Why Do I Really Want To Become An Aircraft Engineer"?.
As your avid interest with aircraft will be the fuel that drives your Goal, and when you finally hold your Full B1 (Mechanical) or B2 (Avionic) Licence in your hand after slogging your guts out for it you will realise all the hard work was worth it, but the work does'nt just stop there, your next task would be to get some On Job Training, but that is a bit further down the journey...... As a journey of 1000 miles begins witht the first step.
Good Luck