There is no perfect time to start a business. If you are passionate about what you do you'll have the tenacity to keep going. Make sure to balance work and life and focus on the task at hand. You'll need to recover and your baby will consume a lot of your time for a while. Don't feel frutrated if things don't go as planned. Just know that they won't! You will probably need to just fit the business in and be flexible. You don't say whether your income is a need or an extra. That will definitely be a factor in how much time you have to build to a steadier income.