Amended Return is not processed yet

Dear Community!

 

By the mistake, I had filed 1040 online for the year 2019 when I supposed to file 1040NR. After that, I filed the amended Return 1040X with 1040NR and sent it to IRS on April 15. However, at the time I don't the any information about my amended return in "Where's my amended return?". I don't even know if it is reached there, because I didn't send by USPS and didn't have the tracking number. I assume it is, because nothing sent me back.

 

The questions are:

 

1) Should I pay for 1040X (1040NR) if there is no information yet in "Where's my amended return?"?

 

2) How long should I wait approximately to know that they started to receive? And if there is no information in that case, what should I do?

 

3) Might I have any penalties for the late payment?

 

With regards,