These two Brennan Center articles offer great information about the bill. The House has passed the bill. It’s up to the U.S. Senate now. Americans need to trust the election process. See links below that will assist you in writing your senators.

This part would require all jurisdictions to use paper ballots that voters can mark by hand or with a ballot marking device. Voting machines and other infrastructure are likely to be a target for hackers and others looking to disrupt or otherwise interfere with U.S. elections, including those working for foreign governments. Paper ballots are an important safeguard against such threats, because they create a tangible record of each voter’s selections that the voter can use to ensure their choices have been accurately recorded and that election officials can use to verify electronic results. Ballots that can be marked by hand also provide insurance against ordinary equipment failures that can result in long lines at the polls. Since the 2016 election, many jurisdictions have replaced outdated paperless voting equipment — but as many as 16 million Americans may have cast their votes using paperless machines in 2020. This subtitle aims to eliminate the risk of paperless voting machines in all federal elections.

https://www.brennancenter.org/our-work/policy-solutions/annotated-guide-people-act-2021

The For the People Act, passed as H.R. 1 in the House and pending as S. 1 in the Senate, would curb voter suppression and make it easier for all Americans to register to vote and cast a ballot. It would outlaw partisan gerrymandering of congressional districts. And it would overhaul our campaign finance laws to amplify the voices of ordinary Americans, combat corruption, and make federal campaign spending more transparent.

https://www.brennancenter.org/our-work/research-reports/people-act-separating-fact-fiction

This is what I sent (feel free to cut and paste if you agree):
People nationwide need to trust that our federal elections are reliable. The January 6th storming of the Capitol by Trump supporters who felt the election results weren’t accurate was horrible. In 2016, some people felt that the Russians hacked into the voting machines and gave Trump the election. S. 1 would require all jurisdictions to use paper ballots that voters can mark by hand or with a ballot marking device. Voting machines and other infrastructure are likely to be a target for hackers and others looking to disrupt or otherwise interfere with U.S. elections, including those working for foreign governments. Paper ballots are an important safeguard against such threats, because they create a tangible record of each voter’s selections that the voter can use to ensure their choices have been accurately recorded and that election officials can use to verify electronic results. Ballots that can be marked by hand also provide insurance against ordinary equipment failures that can result in long lines at the polls. Since the 2016 election, many jurisdictions have replaced outdated paperless voting equipment — but as many as 16 million Americans may have cast their votes using paperless machines in 2020. The bill aims to eliminate the risk of paperless voting machines in all federal elections. Please let me know which parts of S. 1 you don’t like and which parts that you do. This is a great article explaining the bill:
https://www.brennancenter.org/our-work/policy-solutions/annotated-guide-people-act-2021