When it comes to Crafts, we've been there, done that, now serving 3 tips in 2 categories ranging from Bead Crochet to Cro Tatting.
Make sure your desired beads will fit onto your desired thread. Size 11 beads will fit up to size 10 thread. I recommend using size 11 beads for bead crochet as anything smaller would make it difficult to crochet.
Whenever possible buy a "Hank" of beads. They are pre-strung and always your best bargain. This makes it easy to get them onto your thread.