1) To gather energies,The basics of magick work well. The basics are Meditation,visualization,grounding,centering,circle casting etc.There are some links on the General info thread about the basics.
2)Spells which claim to physically change into something are fake. Magick comes from nature.
3) Starting with spells are not the right way. You have to know how magick works. Research!
4) You can't summon something.That's fluff. Say to invoke something .