Online IRS w-2 and Transcripts

Long story short. I have not filed my taxes for last year (2018) due to my tax preparer passing away.  He also had my w-2s (I have 3 w-2s).

 

I know I can contact my places of employment or the IRS to request new copies of my W-2. I was wondering if I could use my 2018 IRS transcripts that are available online.?  I read somewhere that this was a viable action.  

 

I was also wondering if anybody knows a site that would help me file my taxes, like a step-step tutorial?

 

Anyways, I appreciate any feedback .