Hi ya, hope all goes well.
I did my first solo about 5 years ago but the one difference i did notice with being in it on my own was i needed alot more right rudder input during the take off roll.
That was in a cessna 152 but aircrafts may vary and not sure what you are learning in.
Apart from that there was better rate of climb but i think that was about all that was different.
Main thing is smile and enjoy.
All the best and good luck.