Frenzen

Hey guys I bought the bike for $170 CAD. There are few issues with it but it might more have to do with how I bike. After biking for a while and or/ little hills, I felt like the chain would move from the chainring. It felt like it was slipping but not completely but it might have to do with the fact I am putting too much force and I am not comfortable using friction shifters (shifting towards me feels smooth but shifting away feels super stiff, not sure if that's how friction shifting works). I biked 20-30 mins without changing gears. I also have no idea how this bike rack works because I have a ortlieb rear pannier style (with the hooks). And it seems like I need to rebuild the the pedals because it seems like they are missing someone, but I am not sure what goes on the opposite side of the reflectors (if anyone could help, let me know or what are they supposed to like). If not I could try to sell these pedals and that rack.