The pots in the pic below were made in an afternoon workshop by people who had never made felt before - so there's no reason why you can't make a goodly pot on your first attempt!
(the dark olive one in the centre which was the finished example I took to show them what they were making).
They're still wet and stuffed with a couple of thin binbags.
The blue one shows the size of the circle which was cut out and how much bigger the aperture is after the shrinking down of the felt.
The one which has a hairy look is made from a selection of natural fleece fibres, some of which need more rubbing to felt down.
(If you decide to have a go and have problems send me an email with a pic and I'll do my best to help)