Walikum as-salam Iram,
Its never too late to start something - May Allah bless you in your investment journey.
Have you seen this post? - Financial Education: Investment TIPS for Absolute Beginners
You should get a lot of answers with the 6 short video series.
One thing i would say is to keep it simple when you are starting out. Identify your time horizon for investment and do the allocation based on that.
Have a look and feel free to through any questions you may have.
Jazakallah
Zeeshan