yeah deff. do some research and ask lots of questions before welding up the notches. i drew up a quick pic. just for a little advice, my dad said this is one of the more important things when welding thicker metals together
by putting an angle on each one of the pieces, it allows you to be able to get the weld threw the whole thing (left side of pic), what he did was do a small bead first (blue), and then on your second pass do a bigger bead to really weld it solid.(red) (right side of pic)