Helping grandma to babysit

So I'm a new mom and my baby boy is 5 months old. I went back to Work when he was about 6 weeks old. My mom thankfully helps out babysitting twice a week mainly on Tuesdays and Fridays. I have a job as an ultrasound tech and I am a per deim worker Which is great because I can make my own schedule. I have one set day a week which is Tuesday's my other 3 jobs i Fill in whenever they need me. After I had the baby my husband wanted me to be a stay-at-home mom but we compromised from me being practically working 5 to 6 days a week to cut down to 3 days a week. I love my job and I love what I do and I don't wanna not work at all and lose my skill. So 2 days can be covered from my Mom. So I asked my mother in law if she would be willing to be be sit for us one day a week( she works from home as my husband's secretary for his company). She was a bit hesitant to Baby sit bc She gets very nervous every time the baby cries because she doesn't want the baby to cry. I mean who does?! But anyways, She hasn't been super present in the baby's life because she has been away in Greece until now. So we both understand that the baby has to get used to her. But my baby is hysterical every time hes around her. I'm trying to help her get used to being around the baby and taking care of the baby but she's not really following my advice. For example if the baby is crying maybe bounce him around a little bit put some music on dance with him Distract him a little bit. It's super exhausting trying to baby her to baby him. I'm afraid that if I cut down to just 2 days a week that My jobs aren't going to use me anymore because I don't have that much availability for them. I'm so exhausted trying to go to her house or her coming over my house to get used to the baby's routine and learning how to take care of him. Any tips or advice to get grandma comfortable???