A friend of mine has warned me it is a right parlava tuning 12 strings?

I wouldn't agree with that, but it does take longer than a six string of course, and inaccurate tuning is probably more noticeable.

I cannot tune a guitar by ear which I think is my friends concern.

The electronic tuner will get you close but the sound will be nicer if you can do the final tweaking by ear. In each course it will help if you play the low pitch string's harmonic on the twelfth fret and compare that with the corresponding octave string.

What you are listening for once they are close isn't so much "is this string higher or lower than the other", but a beat between them. That is, a slight "wow, wow, wow" of the combined tones. As you adjust the string the speed of the wows changes. The aim is to eliminate it altogether.

If that doesn't make sense to you, or you can't detect it, it will be well worth your while to get somebody to demonstrate it to you.