A friend told me about a company giving a loan amount to 400k and will be paying back 32k every Monday.. And I'm using it to start a dry catfish business... Would get an oven and smoke fish and smoke for people too.. Please what's your thoughts?

Hurry slowly

Be sure of
✅fish source
✅Price of oven and other equipments
✅Source of power
✅ what is your % tendency to bounce back after a bad day or two?
✅ Your target market
✅ Power source
✅ Your preparation against theft

I want to assume it will take 3 months plus to pay back with interest, for someone else it's doable, it may be tough, now I don't know you (that is, your strength and weaknesses), considering the above you know the answer you are seeking

There's very little information you provided in your post and as such, we may not have a full picture to give you good counsel.
Have you had any experience in doing this business before seeking out this loan?
If yes, how well have you managed the risks and how certain are you about your ability to repay that amount every Monday?
Have you inquired about the interest rate and loan obligations?
Do you have a plan on how to manage the associated risks with the business?
These are some questions you have to answer to make an informed decision

Have you inquired about the interest rate and loan obligations? Yes
If yes, how well have you managed the risks and how certain are you about your ability to repay that amount every Monday? Working hard in my marketing strategy 50%
Have you inquired about the interest rate and loan obligations? Yes

What is your experience in the business, what is the return and is there market for the dried fish. It is better you use your money first gain experience and latter expand the business with loan