The starting point is to become aware how the golf club, player's hands, feet, head and body should be placed. One good idea is to get some photos which present real players.
Then you should draw the player as a stick figure - do it with the pen on a paper. His head should have at least eyes and nose to show how the head is oriented. Find the right limb angles including the feet and right body curvature. When the stick figure looks right you can insert some thickness. Do not try to draw it in a computer until you get it right on paper. It can be very rudimentary but it must look a golf player just hitting.
There are numerous "Draw a golf player" tutorials in the web. Some of them show how an artist work. One example https://www.youtube.com/watch?v=1G0L3YdOUwo That guy obviously knows well how a golfer acts. He can imagine it, he doesn't have to extract it from a photo. In addition he probably has practiced drawing say 50 years.
Inkscape is very good vector drawing program for simple images. You can draw with the bezier curve tool ("the pen") by clicking. Edit with the node tool and insert fills and strokes as needed. Work some tutorials, the web is full of them.
Inkscape has one trap. Manual tracing with the pen is so easy that you can copy the essence of a player photo in the day 1. Only import or paste a photo on the artboard and lock it in the objects panel to prevent it moving. The trap is that you forget to learn to draw it by yourself.
ADD: There's in a comment something that must be known. It's not especially difficult to make an exact copy of a simple drawing like the player in your example. A copy is a copy, no matter you have drawn it or used a copy machine. It's still copied (=a derivative work) if you change a part of things. A drawing based on a photo can also be seen as a copy. There's no predeclared measure how much it can legally resemble the original.
One way to avoid copyright and drawing problems is to purchase an image. Theoretically it's possible a suitable image is included in a free clipart collection. Read the license before using a downloaded image. If there's no explicit license that says this is free, it very likely isn't free. Using
some free images needs you include also the name of the artist.
Using clipart is not free of artistic difficulties. Making an acceptable composition is still a challenge (colors, placements, fitting into the wanted mood)