I'm having troble making good miter joint's, any answers

You can buy little mitre boxes whereby all you have to do is fit the wood pieces in to get the right angle for the size of frame you are doing. I believe you can buy them in picture frame shops.

Don't be discouraged. It is a very difficult task. Opposing sides must be equal lengths, exactly. Making eight exact 45 degree cuts is extremely difficult.

Go to Woodworkers on the Web Association site, join and get assistance there.

Woodworking at the WWA