I think answers to your questions are:
It depends on your jurisdictional requirements. It took me about 7 months to be up and fully running with education, licensing, insurance, business startup, etc. Each jurisdiction varies slightly, so make sure you research your jurisdiction’s requirements really well to ensure you meet all the requirements. Here is a link to InterNACHI’s guide for Quebec: https://www.nachi.org/licensing-and-certification/ca/quebec
I am not sure about Canada, but it is probably similar to US - it will depend on your local market and your drive and determination to be successful. Remember, doing the Home Inspections is maybe half of the full job - the business side of things is where a lot of Inspectors fail (marketing, etc.). Use NACHI’s resources to help you learn.
Hopefully like Larry suggested, NACHI’s education team can help point you in the right direction.
Like Richard said, you do not need an Infrared camera or Radon CRM to get started. Yes, you will need many of those other tools, and yes it will require an investment up front, but like any business start-up, it does require some capital. Home Inspection businesses, however, are one of the few cottage industries left that you can start for under $10,000, and maybe even under $5,000 or less. You can start off with some cheaper tools, too, and then upgrade to better quality as you get revenue going. Things NOT to be cheap on would include your ladder(s) - your life depends on those! You can get by with some good quality rubber-soled tennis shoes for roofs, but pick and choose which roofs you mount. Again, your life depends on your decisions, too, so think seriously about getting an extendable camera pole and/or a drone/sUAS for the roofs you choose not to mount. Be sure to have several back-up rechargeable flashlights/headlamps as you will use these constantly. I would also recommend some Tyvek/disposable coveralls and some knee pads for crawlspaces. Respirator is very important for crawlspaces and especially attics - I learned the hard way with a bad respiratory infection my first year due to a mold-infested attic. You should have a good quality Electrician’s screwdriver, too, for inspecting panels. The gas and CO detectors can be added later, too - you do not really need those to get started. Keep at least a couple of receptacle/GFCI testers in your toolkit as you will undoubtedly leave one behind now and then. You will also need a decent website and you may need to advertise (Google works well for me) for awhile until you get good organic SEO going. I started off with a less-expensive reporting software package, but looking back, I wish I would have just invested in the better software right from the beginning as it would have saved me money and time in the long run. Personally, I use Spectora, and it is much more than just a reporting software - it also manages contacts, Agreements, calendaring, automated emails/texts, and more including customer payments/invoices and it has a monthly payment option to make it affordable starting out.
Best of luck to you! Perseverance is your best ticket to success.