You mentioned thin oil and that some of the tappets you removed could be easily pushed in. This suggests that they are not holding pressure, and therefore tap like crazy, and may not be opening the valves properly. Best to get a mechanic to have a listen, before taking the head apart again.

I dont think you will have damaged the cam too much, and the valves will be OK even after light contact.

Did you use the block timing marks? They are very unreliable and it's easy to be a tooth off resulting in light contact. Best to use the Kent disc and find TDC with a guage or modded spark plug tester (easy to build with threaded rod, tape, and a electric testing lamp).

What pulley you running? It may not be possible to time that cam properly on the standard pulley.