Practice makes perfect!! He will get stronger really fast. Can he get down on his own? You can spend time helping him learn how to maneuver himself around effectively so he will be better coordinated and need you less.
My DS1 was very much like that, very wobbly! DS2 is a rock!! He started pulling himself up two weeks ago and now he will stand for ages. I hardly have to watch him that closely and he rarely falls. I've noticed he's learned very quickly how to led go and gently drop to his bum. It's been so great because he was so whiny before but now that he can move around how he likes he is so much happier! I'm actually finding we are the opposite, I am getting so much more done now, lol.