So It's been my third ride today. I'm getting use to the bike and today I achieved 10 miles on a plain route. I realised that climbing changes the ride a lot. With a little climbing I can't even achive half this route. About brakes; I hated these mechanical brakes, every time I'm breaking they sound like I'm scratching a fork to a plate. So I ordered hydraulic brake set since I spared it's money when I buy the bike and also a set of continental 4 seasons tyres (bike shop said gp5000 are good tyres but they go off easier). I leave the wheelset for now as a gift to myself in future as you guys advised [perhaps after losing 15-20 kgs
]. I still can't post the bike due to my lack of entries. I will post it soon and thanks again for every bits of advice by everyone who wrote here.
finally the picture: