OP, please don't. It's really not in the animals' best interests.
The impression that one throws two dogs together in a field and lets nature take its course couldn't be further from the truth. There are legal and ethical responsibilities these days in breeding pups.
You'll need to know what to look for and feel for (sometimes including internal exams) to know she is ready for mating. Bitches do not stand rock steady and some can be very aggressive when mated. Would you know if that aggression was because she wasn't ready or just being a grumpy old bag? Holding a bitch down to mate her can result in injury to her or your dog.
Do you know what a slip mating is? When he ejaculates into her but hadn't tied properly, raining semen all over the place. How long to wait before trying again? The chances of the mating being successful.
What if the dog jumps on and off with nothing happening, distressing the bitch in the process? If he's not mated before this is likely to happen. No bitch wants an inexperienced dog jumping on and off her day after day whilst you chaps learn by hit and miss how to mate dogs!
Do you know about the care and feeding of the inwhelp bitch? Do you know your legal position if the bitch gets an infection after the mating? What if there are problems with the puppies? Cleft pallet? Disabilities?
It's not a friendly arrangement. I'd be concerned about any bitch owner who wasn't demanding and wanting the best service for their girl.
If, having read that, you're still adamant you want to breed her, please please get her properly health tested and ask an experienced breeder to supervise the mating. Otherwise, I think you're putting your own vanity above her welfare.