𐑝 does look a lot like the ordinary letter "f". And it makes a similar sound, except voiced: the sound of the ordinary letter "v".

You might notice that 𐑓 has the flat side facing forwards.

Be careful: please don't confuse 𐑓 with the sound of the ordinary letter "J"! That sound has a different letter.

And be careful not to mix these up with the Shavian letters 𐑐 and 𐑚, as well.

The shape of the letter 𐑝 reminds me of the shape of the arch of a viaduct.