1) $50-70 for handjob only is fairly reasonable. $70 might be getting a bit expensive. If you pay for a 30 min massage you could get the hj at the end for an extra $40ish.
2)read reviews here to see where to go for good service. Locanto is a minefield, but there are some tricks (reverse photo search etc) to help you navigate.
3)you can generally just walk into a parlour, but they can be hit and miss unless you know who you want and pre-book. Many girls will offer body slide, but have no idea how to do it, effectively just taking your money and going through the motions. Some girls are strictly massage and hj only candidates. Some don't even do those well, but that's the value of this forum.
4)in a parlour you need to pay for the massage first, then arrange the extras with the girl. The parlour only makes money from the massage, the girl makes money from the extras. This is why the parlour will insist you get a massage, and the girl might get a bit upset of you decline extras.
5) just get out there and have fun. Keep an open mind. Be respectful to people, especially the ladies amd you'll find they are respectful back. If you're getting bad vibes or just not feeling a particular situation, don't be afraid to just walk.
There are some generalisations in what i just wrote, obviously some exceptions exist. Good luck and happy punting!
Make sure and come back here and leave some reviews once you've tried some places/girls