Full-time job and starting small business on PGWP

[computerscience23]

Hello guys! I recently graduated and applied for PGWP. I am currently on implied status. I started a full-time job and looking forward to starting a small side business soon. I will register the business on CRA to get the business number. I was wondering if I can do so legally? Would that have any implications on PR application in the future?

Thanks in advance!