Hello there! These are looking pretty good, you aren't a total beginner . I really like the guy with the moustache, he has good character . I would suggest (mainly for figures) working on using fewer lines to describe things, it looks quite nice in the landscapes (that purple one is really nice), but it gives figures a less definite edge when there's more than one or two lines.
Also, good to see some greyscale compositions! I think pushing the values would make those even better, you just need some ligher tones, for example a ligher line on the horizon or from the glow at the bottom of the buildings. (by the way, are these from imagination or photos?)
Keep up the awesome stuff
Your paintings have a ton of energy, that I really wish I had in mine. You have a ton of imagination and a ton of potential.
My only crit is on the painting with the girl and the car, it feels like the car is in a different perspective to the girl and the city. It feels like the horizon line is higher for the car than the girl and the city.