The etched guage is for your reference once you've set it and so you can reporoduce it if you remove the seat for any reason. You adjust, you try it out, you readjust if necessary. YOUR preferred riding position will not be found on a chart or in a manual.
Fixya is a place to ask people questions, not to obtain things directly. Usually the best thing to do first is search Google, but I could not find a manual for your computer that way, so I'd suggest you contact Serfas: https://www.serfas.com/contact-us I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881
generally you have to put the pump up to the nozzle and have the lever down then put the nozzle in tightly and then pull the lever up. If after several attempts it doesn't work the pump may be broken, as bike pumps generally break easy
you may have a presta valve which is a different compare it to the one on your car lets say if they are the same you imple place the pump nozzle on the tube and open the lever to lock in place is indeed it is presta the have a much smaller size simple open the nozzle and flip the to pieces inside to allow the pump to be presta capable ok also you will need to screw open the presta valve before trying to pump ok if its still alittle frusterating simply bring in the pump to your local bike shop and they will be more than happy to give you the low down on the pump functions ok :) happy riding ok :)
Sounds like you are doing everything right on the pump end.
The culprit is probably with the Valve. There is a small tip on the end that needs to be unscrewed to allow air in and out. Loosen up the tip and give it a couple taps to make sure it is moving freely then try again.
Mount 'em and ride "em. If he doesn't like the feel your only out the twenty minutes to flip it. Chances are if there isn't an arrow they are not directional.
