Undisclosed student work experience in previous visa

[RKS2199]

Hi everyone I hope you're well. I just need help figuring out my situation. I applied for and received a Canadian visitor visa last year. I went to visit family, but now I'd like to immigrate to Canada. I had 3 years of part-time skilled student work experience that qualifies for FSW. BUT I didn't disclose my part time work experience in my previous visitor visa application. I just stupidly wrote that I was a student for the entire time and didn't mention the work history. Would I be charged misrepresentation if I now attempted to apply to EE with my part-time student work experience ( I have all the evidence)? Or should I send a LOE before even applying for EE and explaining to the IRCC that I made a mistake. PLEASE HELP.