Playing on moderate, this is what got me into low orbit. It consists of two radial Hammers, a reliant with 4 tones of fuel, and a swivel with 2 tones of fuel. dV= 4462. If you dont have these you may not be quite ready. to calculate dV, its dv=lsp(engine)*9,81*ln(mass fueled/mass emptied) do this for all stages to get the sum delta V. Until you get good at launching, I'd say shoot for a delta V above 4000. I also like to send them unmanned with the basic probe head so i don't waste kerbal lives and know how the thing will fly without SAS, but thats my personal preference. Most NASA flights were rehearsed and simulated unmanned before sending people up.
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This is my high orbitor after upgrading the launch pad. if you need money do ferrying missions. dV=4270
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This is the same design, but with the next tier fuel tanks and the Terrier engine. Notice the dV jumps to 6520. This was enough delta V to send probes and orbiting satalites around the moon and minmus and satalite missions have reaped in tonnes of cash. not quite enough for a lunar landing though.
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