What accesories do i need as a beginner photographer?

I currently own a nikon d3200 with 18-55+extra battery. As i doing my own learning. The problems i encountered were lens flare and reflections on the glass. I'm buying a tamron 10-24mm for wide shots. Do i need a lens hood? How do i totally eliminate lens flare and reflection? What would be a good beginner tripod? There are different types? I got a dslr tripod before the cheap ones are hard to pan/tilt. What are dslr harness used for? What other things i could be missing out?

Lets start with each of the points you made in your question

"encountered were lens flare and reflections on glass"

These are two separate issues.

Lens flare, you can see when looking through your viewfinder. All you need to do is move a little to the left or right until the flare disappears.
Reflections on glass. This is only avoidable if you are shooting out doors during the day. To reduce reflection, you need a circular polarizing filter. Again, you will see the reflection disappear as you rotate the filter.
Lenshoods usually come with wide angle lenses or are built into them.
Unless you are taking long exposures, you really do not need a tripod. Buying a "beginners" tripod for under $100 is not recommended. Instead, do some research and find some tripods that can hold at least 7 kg and then start saving your pennies.
Panning and tilting. For this, you need a second head. They are what are called fluid heads and are used when shooting video or film were a panning or tilting shot is called for in the script. This kind of head is expensive, figure about $250 at a minimum.

I have to guess when you ask about a dSLR harness you are asking about something you wear and hang one or two dSLR cameras from it when shooting things like sports or action shots.

Rather than spending money on a harness, tripod or fluid head, look into first learning how to use your camera and two lenses intuitively, so that the camera and lens(es) become part of your minds eye,

While you spend the next year or so doing that, do your research and save your pennies for the next item you want to add to your fine camera system

As a rule, the more gear you have, the longer it takes to get good. One camera, one lens, one computer with post processing software.

And knowledge, enthusiasm and perseverance.