Many ways to read this epic poem. Besides flat text versions from Wikisource and Project Gutenberg, here's a PDF, typeset with 17th century inspiration: http://www.samizdat.qc.ca/arts/lit/paradiselost.pdf
TIL that ſ (long s) is an archaic form of the lower case letter s.[1]
The latter-day Futurama episode "All the Presidents' Heads" uses it as joke a couple times when they time-warp during the American Revolution.
[1] - https://github.com/tsmacdonald/first-collection/blob/master/...