Am sure you already know this but the change can only come from YOU.
Even if we ask someone to pray for us it won't be accepted. You need to motivate yourself and take some responsibility now before your time is up.
Shaytaan is way too experienced in making us think we are going to live foreever and we'll make a positive change tomorrow and tomorrow never comes.
Start with one salaah and be consistent in that salaah and then build it up. I would strongly urge you to focus your attention and energy on the faraz first before doing the sunnah and extras.
Spend time with Islamic individuals and you'll automatically pick up excellent habits in sha Allah and this in turn will change your mindset.
If you can't find any islamic people listen to islamic lectures.
and download free islamic lectures.
Don't let shaytaan win.
You need to put the work in and i suppose that goes for this dunya too. For example, if you want good grades at college/uni/school etc you need to revise. In the same way you need to work for your akhira. Work extra hard and trust me you won't want to live your old life every again.
May Allah swt make it easy for you Ameen.