I'm part of a Doctoral support group and the best advice given is to treat getting a Ph.D. professionally as a job and not as a class.
Recently my current professor said something similar, it takes having a serious mindset when it comes to getting a doctorate and treating as your job, a position, and not simply as a student or a class.
We are not in the doctorate program so much to learn, but we are in the process of being refined, challenged, and developing as the experts in the field God has led us to pursue doctorate training, not studies.
He advised looking at this as in the training field and its time to move mentally from student to you're now looked at as a growing peer in the field.
In the doctoral support group, similar was said but for all those who are starting out, I share the same advice given to all of us, You are there not to learn, but you were accepted based on what you've demonstrated you know and have demonstrated competence in the field through you may not feel like.
The best advice is given and I apply even as a stay at home, being a doctoral student is now one of your other jobs.
As I encouraged other stay at homes and I try to those who are new to the doctoral program like me, embrace your new role in life.
Get up and treat it as "going to work".
Get breakfast.
Get dress especially if you don't feel like it.
Ladies, a little lipstick goes a long way, but dress even if it's for yourself and treat this as a job. Even as a mom, this is your position. Embrace and dress for it.
It's not going to be easy it, but one day you will present, defend and be given the title "Doctor"
You are working toward earning a place of position.