Sit with your father, write down all loans and plan to pay it back. What is loan for and look for the benefits out of it.
Discuss all scenarios and have a open transparent communication.
Make sure you explain your situation and share how tentative your hob is in current market etc. plus how these loans put pressure on you mentally.
If he understands well , if not decide not to sign for any loan and cut off communication with him for next 6-12 months.