Setting up helicopter with out any knowledge is the last thing you should do. If you can't use such a basic tool as the pitch gauge the best thing you can do is visit your nearest flying field/club and talk to experienced pilots.
To give you bit of an idea to start with, set your throttle/collective pitch at half stick with the blade pitch at 5 deg. positive. (fly bar paddles at Neut,) After, set the travel adjustments pitch curve in linear manner to plus 2deg. at lowest stick, (as a beginner) and 10-12deg at full.
Good idea is to stick on to your landing skids a decent size training X to begin with.

You remind me my early days, I hardly knew there was such a thing as RC helicopter when I bought one s/h, and didn't know even what is a servo was. When I saw it moving I thought, what a bloody genius thing! LOL.
I was so scared of the huge model at 2 meter rotor diameter I have designed in my backyard a soled galv. 3 inch tube, 5 feet high, concreeted to the ground with 100+kg of foundation base!
The model was based with its landing skids on ply platform and my genius design alloved me to hover the model up to a foot high off the platform as it was attached via solid 10mm metal rod free to rotate 360 deg.
That was a great thing to learn to operate Rudder, which is the most important function to learn to fly the things. The platform was also handy to start the model with a small belt under the nose of the model. No gyro to start with those days was a bit of a handful plus one servo operating the throttle and collective pitch, work that out, LOL.
It is so easy now days, some even land when you speak to t

Those were the days, 5ch. to run off 4ch. radio.
ell them so, LOL.