Place the chicken pieces in a bowl and sprinkle over the salt, pepper, cumin, paprika, and oregano. Toss well so every piece is nicely coated.
Heat the olive oil in a large skillet over medium high. Add the seasoned chicken and cook for 5 to 6 minutes, stirring occasionally, until lightly browned and mostly cooked through.
Stir in the onion, garlic, and red bell pepper. Cook for another 4 to 5 minutes until the onion softens and the chicken is fully cooked.
Add the refried beans and cook for 3 to 4 minutes, stirring so everything comes together into a thick, creamy filling.
Assemble the Burritos. Heat the flour tortillas in a dry skillet over medium heat or microwave them for 10-15 seconds to soften.
Lay a warm tortilla on your counter and start building your burrito by spooning about 1/4 cup of Mexican rice into the center. Add a generous scoop of the chicken and bean mixture, followed by a spoonful of corn. Top it with a few spoonfuls of guacamole and finish with a good handful of cheddar cheese.
Roll it up. Fold in the sides of the tortilla, then roll it up from the bottom, making sure to keep all the fillings inside.
Place the rolled burritos seam-side down in a hot skillet for 1-2 minutes per side for a crispy finish.
Serve. Repeat the process with the remaining tortillas and fillings. Serve the burritos warm, and enjoy!