It really depends how much work you can continusely do. It doesn't matter if a tute is before or after a lecture, because they are usually based upon the weeks before work from the lecture. Lectures do take a lot out of you though.
As for different teachers, do't be picky, jsut choose the time you want. Some tutors you'll find are pains ad others a really good, depends o your learning though and what you are studying.