I don't have a tutorial, but it was really easy to make.
For the blue parts, i bought 2 pairs of blue leggings. Ones I just used normally, for the pants, and the others I turned into a shirt usit this method: www.youtube.com/watch?v=nuc5yn… (since leggings aren't as stretchy as tights, I had to take it in all along the outside to make it more fitted)
the white and red stipe-y part is just white fake leather, and I painted the stripes on with red permanent marker. I used a symplified version of an underbust corset pattern, without the boning. But you could also use a red and white striped corset if you can find one. They are just kinda hard to find where I live, so I had to make do.
the belt is just a normal elastic black belt with some pouches I either had around the house or bought spray painted black and glued to it. But if you'd rather not buy stuff, there is also a really cool tutorial about how to make utility belts here: www.youtube.com/watch?v=m1HdhF…
the boots are just old boots spray-painted red, 'cause I was out of money by that time and couldn't buy a new red pair. (the ones I used were made out of suede, and I do not recomend it kinda absorbs the paint and I had to use 3 cans of spray to get them done. Leather, plastic, or any non-porous material would work better)
the gloves I bought and cut the fingers off, the star on the top part is some leftover fake leather spray-painted silver, and the shield is a roman gladiator costume shield, with some cardboard and a layer of foamy on top and then spray-painted as well (since foamy is porous, you have to cover it in either some kind of white glue or varnish and let it dry before painting it, or it will look weird).