Sir,
i will not be able to sit down with you as i am in the other half of the globe. I just wanted to give you my advice, from somebody who went from 0 to expert in a year with Skp. pipe tees are rel. simple, draw 2 cilinders in separate groups, place them in position and use solid tools like trim or substract to make your shape. But the best way is to learn from tutorials and PRACTICE until you can master it !
best of luck,
razvan