Welcome - don't sweat it, we're all a lil lost 'round these parts
BTW - I use the Garmin Geko GPS on my bike (already owned one anyway lol). If yer into this enough that you'd buy the Tiny Tach (awesome instrument), you just might dig what this inexpensive lil GPS will do for ya.
They can be had far cheaper than this, but here's a link to the specs;
https://buy.garmin.com/shop/shop.do?pID=220#specsTab