Am I going to slow?

You should follow your own speed. If it feels a bit too slow, try experimenting a bit.
If you want some slow friends to hang with this might be the place for you!

I like to do 10 new lessons a day. I try do one batch of 10 each day, but if life is busy I only do reviews.
Often there are similar things in various items, vocabs that has same reading as the kanji and such, so getting the items out and having more than one similar item of same kanji and reading helps improve what you remember.
The SRS will help take care of the harder ones too, as they fall down where you see them more.

In burn it should be known fairly well. It is always possible to repeat them later (unburn items, whole levels and so on)