Editing and improving sound of 2 MP3's recorded on Audacity.

I'm a hypnobirthing teacher and have 2 MP3's recorded on Audacity. One (breathing patterns) I have said 'Note that the word contraction has been replaced with the word surge in these MP3's but you can use the word contraction if you prefer to do so. Although it will not be relevant for this MP3. I realised it will be relevant!! Need to take out 'Although it will not be relevant'. The positive affirmations MP3 I recorded and forgot to change the levels. I had recorded others as the track on -14 and my voice on -6 in Audacity so am not sure if it can be changed now to be the same as the others?
I cant seem to upload the MP3's on here so may need to send to you a differeny way?
Also would like an additional sample where you can improve sound quality to sound professional, I have 11MP3's so if it sounds better on the example you provide will pay for others as an additional job.
Thanks