You will get loads of advice, but it all boils down to what works for you. I was entirely self taught and never saw another unicyclist for 15 years after buying my first one, then I met a unicyclist who obviously knew what he was doing and I was clearly doing it all wrong. I still can’t do it right, but funnily enough, I manage to get on often enough to ride many miles a week. ;0)
Some things to consider, though. Either do a static mount or a roll back mount, but don’t try to mix the two techniques.
I learned a static mount. Bottom pedal at the very bottom. Plenty of weight on it to hold the wheel absolutely steady. Wedding tackle on the seat, then step up. Wave the arms about a bit and it works. (The mount, not the wedding tackle.)
An improvement is to have the seat just that little bit lower, and to hold the front of the seat. I normally mount with the left foot down, and holding the front of the seat with the right hand. Funnily enough, I still hold it with the right hand when I mount with my right foot down.
Another improvement to the static mount is to not put any weight on the seat until you have both feet on the pedals. So, left foot on the bottom pedal, right hand on the seat, spring up. Right foot on the pedal, find your balance, lower your bum onto the seat.
If you try a roll back mount, change the emphasis. Point the bottom pedal towards you. The crank shouldn’t be horizontal, but a bit lower than that. Now, put the appropriate bits on the seat, and push the pedal down. Don’t spring up and forwars. Just sort of ‘unweight’ the foot that’s on the ground. The foot on the bottom pedal will bring the uni underneath you. if you try to leap forwards, you will pass the uni as it goes in the opposite direction. Remember to wave. ;0)
A useful half way house is to learn free mounting on a downhill slope. Just enough slope that you need to point the lower crank back towards you a bit to counteract the slope. This way, the uni holds still that little bit better. As your freemounting improves, just adjust the ground to be a bit more level. Most carparks have a knurled adjustment knob under a grate in the left hand back corner. ;0)
Another trick is the ‘backstop’ mount, where you either use a naturally occuring lump in the ground, or a small chock behind the wheel just to hold it that bit steady. When I’m muni-ing, I tend to try to find a natural backstop.
Most of all, relax. If you spend half an hour practising the freemount and only succeed twice, you will end up thoroughly cheesed off. Practise it a bit at a time.