Now, I don't know about completing RTP faster - you'd need to contact the TTA about that and it's certainly worth your pursuing it. Rather than credits, it will hinge upon the amount of classroom teaching experience you've had as part of your BA, I'd think. Look for TA posts - they might not pay well, but they're at least a foot in the experience door. However, othrs with far greater knowledge than me can dvise you better about playworker, etc posts. Good luck - do come back and let us know what the TTA say, will you - it helps others in the same position if you post your experiences on this thread.