Monday Hour One – honouring myself

I’m new to Monday Hour One, first week applying it. I have a lot of unhelpful thoughts when I think about saying yes to my calendar and saying no to other people asking me to do things. My time at my day job is non-negotiable but for some reason I don’t see my business as “legit” enough to say “sorry, I have to work” to friends and family. I work my day job Tues-Thurs so I work on my business on Friday/Saturday. It’s hard to commit to business on Saturdays since it’s the weekend for everyone else. It seems so obvious when I write it down that I just need to change my thoughts and stick to my guns but can I get to the root of this thinking somehow?