All of these letters are similar to the numbers from which they are derived.
੦
Don't worry too much about being perfectly round.
੧
You can give this number a straight tail or give it a bigger flick. One thing to be concerned about is that if you start off with too much of a horizontal lead into the beginning of it, and then quite a long flick at the bottom right, you can make it look like an eight.
੨
don't concern yourself with it looking too much like a kakkaa, you aren't writing numbers with the letters (not nomally, any way).
੩
Again, don't worry about the loop if you write one.
੪
This is a lot quicker to write if you write it like this.
੫
Miss out the point at the bottom-left and you can speed this up considerably.
੬
This is pretty much the same - three loops.
੭
This one looks a bit like a ਹ () but, like ੨ above, the context should sort things out.
੮
This is pretty much the same as the Gurbani version of the number
੯
So is this one although you can make the loop at the top-right as big as you like.