Here's what I would suggest you get to start shooting your .54 caliber muzzle loader.
.530 diameter lead round balls, a tin or two of #11 caps (I like Remington Black Powder caps), .015 thickness pre-lubed & pre-cut shooting patches in .50-.58 caliber, 100-200 cleaning patches, .54 caliber, .50 will do or cut your own from an old cotton t-shirt, an adjustable powder measure made of brass, .54 caliber cleaning jag, screw in ball puller, a short starter, and a tool box large enough to put it all in with some extra room still left inside it. Since you are in Canada, traditional black powder such as Goex may be difficult to find so I would go with Triple 7 in 2Fg granulation if you find it, if not them Pyrodex RS. Read the owners manual, twice. I would start with 55 grains of powder, shoot several times at the same spot and increase your powder charge in 5 grain increments until your groups get nice and tight, then you're there. You may have to swab the barrel in between each shot, every 4-5 shots or every dozen times you drop the hammer on another fresh powder charge, it depends on your own particular rifle. Swabbing is just running a cleaning patch down and back out to remove some of the fouling and make loading easy again. You can use spit to lube your cleaning patch, dampen it with alcohol or use any number of homemade lubes but never use a dry patch only as you'll push more junk back down into the bore which will cause misfires (or no-fires for that matter). If I left something out, it will be mentioned but I hope this helps.
Once you get home from the range you only need a drop or two of liquid soap in warm water to clean the bore completely, then apply your favorite rust preventative inside and out sparingly.
PS- I would also get another nipple or two as the ones from the factory are generally less than satisfactory. Investarms nipples are usually 6 X .75, get a SS or bronze (TRESO) replacement.
