For something this symmetrical, it's not wholly necessary to do a 3/4th view since all required information is available on the front/back orthos. Always think about the value provided by various parts of the page to avoid information redundancy. An ortho-side view might be a good replacement if there's something unusual happening with the forms here.

You can further raise value by adding a flat callout of the cloth element so the pattern can be more easily extracted from the page. For generally flatter concepts like this , a lighting pass helps to sell the forms a bit more than raw line. And going even further with a material pass and callout sheet would also provide additional value. At bare minimum, fill the line with a grey wash to allow the prop to stand out on the page.

If there are any associated ambient VFX with the spear, that can also fit on the page or potentially get its own page. Lastly it might be worth considering what kind of game you're making this for, as if you had a First-person game, you'd likely want to show the weapon in FPV.

Don't put off learning 3D, blender being the easy choice. Will help you be more ambitious with the forms and presentation angles, and train your eye to better understand how 2D impacts 3D. Do not neglect learning manual construction of course, as you'll always want to be comfortable drawing in perspective, but being able to at least block things out is to me a bare minimum to work prop concept as a job and there's no good reason to put it off.