You can email Senator Warren here: https://www.warren.senate.gov/contact/shareyouropinion

The Electronic Frontier Foundation (EFF) has a letter you can copy/paste: https://act.eff.org/action/congress-shouldn-t-control-what-we-re-allowed-to-read-online

There's multiple other Democrats who sponsored this bill in addition to Warren, but thankfully it never made it out of committee. Since the new Congress started on January 3, this bill died in committee.