FHB putting in an offer before open house/currently with tenants

Hi

newbie here! We found a property we love, called the real estate agent because it was just listed without an asking price he said mid to late 700s and when we asked about when the open home would be he said it’s currently tenanted and it would not be this weekend because it’s too short notice to do a open house but then I asked if we could come and visit since we loved it and he said he would check with the tenants and they agreed.

My question is if we go tomorrow and love it, which I suspect we will, do we put in an offer? my family members said it’s a bad idea and they will just think because we are such eager beavers the rest of the people will be too - my feeling is if we make an offer in the range they are asking for would it be better than having to manage doing an open house while it’s tenated or am I naive? I’m worried we don’t put an offer in it goes to the open house and then becomes more competitive but if we put on the upper end say 770 we might have a chance of being accepted? or do we start low and let it go to the open house and wriggle up? it all feels like a weird game to navigate the psychology of how to do this - help!!