Since we as frum Jews maintain shomer negiah, with no physical contact prior to marriage, there should be no problem! Shidduch dates outdoors with proper distancing.
And you don’t need anything more than two witnesses (required by halachah), a marriage license from the state (secular law requirement) and an officiant (doesn’t even need to be a rabbi al pi halachah but secular law requires it). As others have suggested, hold the celebration once the pandemic is over.
Good luck.