Dont worry about not being solo, the more you stress about it the longer it will take. I got to 66 hours before I got sent solo and that was after 7 hours on a different aircraft type. it was however begining to get to me seeing people who started training after me getting sent solo before me arround the 25 to 30 hour mark infact all my pre licence solo was done at my second flying school, i how hire from both places depending on where in the country I am.