Yes, you probably CAN do it all yourself. You're strong. You're talented. But you'll also burn yourself out and won't be able to do everything 100%. Ask for specific help. There are tons of people who are dying to assist you. Have someone bring over dinner one night, especially in the beginning.
The biggest lesson I've learned in the past year, and one that I need to remind myself of daily, is to have fun. I embarked on both of these journeys out of desire. I wasn't forced into either and that makes me very, very fortunate. As a result, every day I try to have at least a little fun. Whether it's pulling Maisie around the living room and pretending we're on a safari or jamming out to some royalty-free Music for a client video, I do something smile-worthy.
Anyone who says there are no shortcuts in life, or there are no shortcuts to success, is wasting a lot of time. There are shortcuts and you should take them. If you're not a baker, buy the boxed cake or, better yet, buy the whole cake at the store and decorate it. I understand the desire to not serve your child processed foods, so just don't do it often. Again, take the shortcuts on the small things.