Keep having fun!

Great start! I see you have a knack for rendering already. I think you're also already pretty good with proportions, just keep an eye out for how you align the features instead. I noticed the direction of the guidelines, mostly on the first one, were starting to deviate from each other, so it may cause the proportions to look a bit different than the reference. Even at this downtilt angle, the direction of guidelines tends to be pretty uniform as they all follow the same perspective. I drew an example down below, let me know if it's useful, and keep up the good work! :)