Just keep doing your daily meditation routine along with it and eventually you'll reach a certain point. You have to gradually build up to this process but use your intuition, if you "feel" like you're ready to practice it then keep working on it. As you empower yourself your dormant Siddhis are opened up but depending on what you've accomplished in past lives some are opened quite easier and faster and you'll have a feeling of inner confidence with some abilities.
I haven't practiced telekinesis in particular but I tried electrokinesis which is actually a common ability that an SS can achieve by causing a bio-electric pulse to interfere with electronics, but this one time I focused on a small LED and made it turn off for awhile and it was the first time I tried doing anything like that but I had a feeling that I could do it because of keeping up with my routine and was having an energy buzz at the time. The same with many things which came to me as a surprise.