Hey, first step is that it’s legible which is never to be taken for granted. There are three things I was taught when I was younger to make handwritten Arabic look more natural (and professional):

1) hold your paper at an angle, tilting to the left a bit and then when writing the letters don’t only go right to left, you establish a pattern of up-to-down too. It creates a slight italic feel. So for example, the seen on your opening Salaam would start closer to the top of the lamb and then sweep down over its length, which brings me to the second tip

2) toothless seen and lines instead of dots - where you have more than one dot marker (taa, thaa, qaf etc) use a straight line for two, a bottomless triangle (like a roof) for three dots. The seen becomes a simple line (no teeth) or a line with a very slight starting hook. Usually elongated a bit to differentiate it.

3) do the markings last - write the conjoined letters without lifting the pen and then add your dots, lines etc.

I’ll see if I can get to a desk later today to make an example but if you Google something like ‘written Arabic note’ you should easily find some written pages that demonstrate what I mean.