Some of my top advice would be,
1. Research - so given you´re planning to breed in 5 years, this gives you time to dedicate. But you must work hard in researching. Included in research, you need to also be taught how to hand feed, this can be done with a vet, local breeder or other experienced person, maybe someone from a local parrot group who has bred before, or an ex-breeder.
A good book could be a helpful reference, find out who the respected authors are and look for books written by them that include breeding info.
2. Vet availability - you can not breed any animal without having the appropriate medical care available for them somewhat nearby. Make sure you have a good reliable vet nearby, preferably with an emergency 24/7 clinic. You need to take the adult birds to the vet and have a check up before breeding them, during this appointment, tell the vet your plans, and ask about things like supplements and diet, as well as any other questions - especially those specific to your bird.
3. Finances - You need to have the funds available to buy all of the equipment (and replacements if needed), but also to pay for any vet visits you may need.
4. Time - you need to have the time available to be in the house enough to oversee the whole breeding process. While the hen is incubating the eggs, you will have more freedom, but once they hatch, you need to be around all the time at first until they are feathered and nearing the end of the weaning process, then you can be around a little less knowing they are able to eat.
So given the time and financial aspect, you need to be either self employed, working from home (as a permenant, not a temp covid measure) or be able to take a month off work (from when the eggs are due to hatch). I don´t think it is possible to be a good breeder and work a 9-5 or long schooldays because you would be out of the home too much.
5. Market research - You need to check the local market and make sure that it is not oversaturated with the species you want to breed. Check shelters and rescues, if there are lots of budgies there, or petshops filled to the brim with them, I wouldn´t suggest them to be a good species to breed and you may want to look into other options. If you want to breed, you need to be filling a void - a species that has a demand so that you will be able to find good homes for them.
You may also want to compile a questionaire that you would ask potential buyers to fill in, and or a fact/info sheet with basic care info like not mixing birds with cats/dogs/reptiles, list toxic foods, PFOA/PTFE advice, how much sleep, cage size, diet guide. You could even set up the original check up appointment for the chicks and do the handover there, that way you know they go to the vet and the new owner sets up an account for their bird.
Remember, just because someone is interested in buying a bird from you and they have the money for purchase, you don´t have to go through with it if you don´t want to for eg, if they live 4 hours away and they have no vet nearby.
Here is a little video, it´s more towards hand rearing, but the same applies for breeding in general,
Remember, if you have questions, ask them!