The phrase "to dip one's toes" means to take a small, cautious step into something new or unfamiliar, often by trying it out in a small way before committing fully. Full definition
Some students want to just dip their toes into seeing whether a particular field is of interest to them, so they'll spend about an hour of their week at a site. (edutopia.org)
Though no one is recommending that you dive right into the dating pool, especially after a particularly difficult breakup, there's no harm in dipping your toes in the water. (cupidspulse.com)
If youre just dipping your toes back into the dating pool, free sites can be a great place to start. (petesgrillandpizza.com)