How to start pumping when EBF

Megan • Happily married. One 2015 angel baby, little girl born Sept 2016, & one due June 2019.
Hi, FTM here and my daughter is a month old that I EBF. I wanted some advice on when and how to start pumping while also EBF for awhile then transition to bottles and breastfeeding. The pump overwhelms me a bit. But I'd like to get some supply in the freezer for just in case moments. Thanks in advance for any help.