I had to combine training with full time job and my head was wrecked after 3rd or 4th day
Me too and I couldn't do more than 2-3 training flights per week.
A 2 lesson per day (early morning / late afternoon) should be no problem, if you can self-study, or even take a short nap during the day.
Actually 2 flights per day (with proper briefing and de-briefing) was the normal training speed behind the Iron Curtain for the pre-military flight training, for many decades until the late 80's - worked OK.