Unless you are applying to a facility where you completed your clinical, then I would not have listed your clinical sites. All nursing programs require clinicals, so your clinical list does nothing to let you stand out, UNLESS, again, if you can show to the potential employer that "I completed a clinical HERE at your facility and loved it so much that I want to WORK HERE."
Your certification list is impressive. Did you utilize these skills as an Orderly? For example, did you draw blood, perform EKG's etc.? If so, specifically list this under your employment as an Orderly. With that said, volunteer experience can be a great highlight on your resume, but we can't tell what you did there exactly. Try to list accomplishments, if you can, rather than simple job descriptions. Be specific about skills you have done, or have experience in (i.e., don't say "bedside procedures" and simply state examples in parenthesis-- It almost downplays these valuable experiences!). Instead, say something like, " Assist nurse in bedside procedures including care for Stages I-IV ulcers,.....X, Y, Z." And of course, include skills that you were able to do independently, like, " Assist in patient ambulation, hygiene care, X,Y,Z. Removal of peripheral IV's, foley catheters (if you did these), X, Y, Z...."
Remember in a resume, it's not so much what you've done, but what you've accomplished. Show off your successes! Brag a little (or a lot) about what you can do, your proven skills! Good luck to you!