I watched Avengers Endgame and I am also a fan of ironman so I know where you are coming from. hehehe. Can I build something like an iron man suit too? Well, the answer is YES. ironman suit is termed "wearable robotics" in this field. I built a weareable robotic arm using a different robot Kit and I actually posted it here on steemit but here is the video:

Once I have all the materials that can complete a wearable suit where I can design it to look like an ironman suit. It will be my pleasure building it. :D