Someone else said it but I'll repeat it. The business of online ordering/Canadian ordering/etc. was no longer needed after generic viagra was made available. It's this easy: See you regular doc or stop in to an Urgent Care spot. Tell the doc it's time in your life for viagra and ask him to write you a script for, say, ten 100mg pills.
The, go online to GoodRX and it will show you the pharmacies around you with the lowest prices with their coupon. Last time, for me, CVS had 10 pills for $23.00.
To sart out with a lower dose, just cut the 100 mg pill in half or thirds. Ge the script for the 100mg pill because the 50mg costs the same amount. Docs get this - you can tell them you are going to cut them in half. There's no longer any shame. A simple "I think it's viagra time for me" will get you a prescritption with no exam, no questionnaires, etc. The only thing you have to worry about is finding a good hiding place from your SO.