I got 1st stim deposit from (2018 return) stay at home father (all of 2019) will I receive 2nd stimulus

The way this REALLY works is EVERYTHING is based on you 2020 income, filing status and number of children under the age of 17. What these numbers were in 2018 and 2019 does not matter.

The IRS will calculate your stimulus based on 2020 numbers; that is what is considered the ACTUAL.

The two payments were just ESTIMATES

if the ACTUAL is greater than the ESTIMATE, you will receive that amount as a credit on your 2020 tax return.

if the ESTIMATE is greater than the ACTUAL, you are not required to return the money nor does it impact your refund. Line 30 on Form 1040 will be zero.

if you are otherwise not required to file in 2020 and you are missing stimulus, then file a 2020 return via fre-file!!!  

https://freefile.intuit.com/

Will I receive a 2nd stimulus deposit if I haven’t filed a 2019 return (didn’t work all of 2019) I did file 2018 and was able to get a full stim check. Anybody in this boat that received a 2nd stimulus deposit? 

it is unlikely you will receive the 2nd stimulus payment as it is based on 2019 tax return.

However, as I explained above, that doesn't mean you are not eligible.  Fill out a 2020 tax return to claim the rest of any money you are eligible for.