I only disagree with the years and years comment above ,that is a personal choice if you want buy into that and a belife system within its self.
You could meditate like Buddha or Jesus today if you accepted yourself in your complete state of just being. Swimming is swimming whether your in 5 feet or 500,0000,0000,00000000000000000000000000000000 +feet

If the real truth is known,we are so much more grand in the scale of things than we already know and we are being held captive by what we have learn't and accepted, been taught in schools and through our folks and by what we are told we can and cant achieve and all the limits including all the man made religious ones. We have accepted limits but they are all false once you step into your own space and time. Proof is because others are out there doing it all right now and they are no different from anyone else. They just realized or were reminded that they could do as they wish and go to any length in any area.

Its all part of the trap of dualisum and being able to see only two sides to things. Truth is there is many more than two sides! Judgment of yourself is a limit placed on yourself. Same goes for judgment about others, it also comes back to your limits and you have then placed another one.

At any time you can cut right to the chase and accept who you really are and be as the Buddha or as all the other Christed ones from throughout history who have been given the truth in their own peoples storyline in a way they can accept it.

1 Acceptance of yourself ,2 love for yourself and 3 love for all the others who are all in this same boat as us, is the fastest route for anyone to gain all their original power back. People who belive in only what they are taught from an external point only, are in a way giving up on what could be real for them. It is once again acceptance of a limit that is real only if you place it.
By what you have started doing Diz you will find out there is no real limit within the space and time that (you haven't created for yourself ) You just rediscovered it by your acceptance that it exists and the peace,love and joy thats found there will increase in intensity to the point where your very molecules will vibrate at a higher frequency. There is no limits to that space it is eternally yours and you are eternally its.

Hope that answered your second question.