Affirmations

Guys i really find it very hard for me to say one affirmation it doesn't make me feel anything like if I want my sp i wrote things i want to change and then it was around 15 affirmations and then I want to work on self concept and it was 20 affirmations and what I do is i wake up repeat the self concept affirmations for 15 minutes then move to sp affirmations but I want to know how much maximum affirmations we can say also if we are saying like total 40 affirmations including everything will our subconscious mind catch each and every affirmation it's really confusing but I also record an audio of these affirmations which is self concept affirmations are of 2 minutes and I want to repeat it as well so I do that

And sp affirmations is of 1.30 minutes and then after that I say all that is that going to work ?