Magnetizing gets easier the more you do it in my opinion. Amazon sells these tiny magnets with a drill bit. Just buy a separate pin vise for the bit and you’ll be magnetizing in no time. I suggest starting off with a cheap model so you can get the hang of it. I magnetized my great unclean one and it’s nice. Just make sure you put enough magnets to make it hold. These are the magnets I used.
First born magnets: MagNetSol Magnets + Drill Bits... https://www.amazon.com/dp/B074SYK3H4?ref=ppx_pop_mob_ap_share
I also use 1/16" magnets for the subsytems, if you feel like magnetizing those.
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https://smile.amazon.com/MagNetSol-Magnets-Drill-Combo-100pcs/dp/B074SYK3H4