Starting without a Niche

I’ve been brainstorming my niche in order to start writing up my website, but nothing appeals quite yet. Before I knew it was recommended to start with a niche, my plan was to have a general website that covers all the topics coaching can help with for anyone, and then market within my existing network- professional contacts, friends of friends, facebook, etc.

I know I should just pick one and start with it, but I also don’t want to start with something that doesn’t appeal at all (and frankly, none have appealed so far). So can I just pick “no niche” and just go with it to start things up?