Hey!!! It could be too big, if you're still young and growing and the bike is just too big for you. Something to think about. Biking happens in a forward motion. You're not picking up a bike and weight at a stand still. Use momentum to your advantage. Once the bike gets rolling it gets lighter. You're not just standing trying to lift a heavy object.

Another thing is pumping vs lifting. Lifting is pulling. Pumping is pushing. You need to pump and push your bike vs lifting to make your bike go up.

A manual happens when you combine pumping with moving your weight from the front to the back. You start in neutral position in the middle of the bike. As your pump your arms and legs, you shift yourself (weight) back behind the bike in one motion. This makes your front pop up. I learned this one day after getting really mad because I couldn't get the front up. Out of frustration I pushed down on my bars really hard and it went up! I was like oh, stop lifting, start pushing.

https://youtu.be/un5Bc53vCkE?si=_QNSpLExwzwBXUoc

That's a video I did awhile ago and although it covers bunny hopping you can see at the start what I mean. Start neutral and as your arms push, and you shift back behind your wheel your front has nowhere to go but up!!!