How can you convert a character to a time (hms) in RStudio?

Welcome to the forum

Probably the best idea is to supply us widh the gode you have been trying and some sample data
Have a look at

Also a handy way to supply sample data is to use the dput() function. See ?dput. If you have a very large dataset then something like head(dput(myfile), 100) will likely supply enough data for us to work with.