Yeah, some algae is typical for a new system especially the first year. Just watch it closely and don’t let it get out of control. Manually removing is always a good option up to a certain point.
Sounds like your on the right track. Just keep a little bit of nutrients and avoid strong light. I know it’s hard! We all want to light our reefs from day 1! The light will grow algae (even if it’s a little) and steal the nutrients away from your nitrifiers. This won’t matter later, but in the first few months it does.