Hi Manas,
TW has given you very good suggestion and guidance. In addition his valuable points, you can try configuring your functional experience scenarios. What I mean is, Imagine your domain company where you worked/working is implementing SAP and you are SD consultant for that project. Now, pen down all your business scenarios and implement them in your IDES. You can also join as a group ( Like other aspirants who are learning SAP MM/PP/PM/FI/CO) and complete one full implementation in your IDES. This will give you integration knowledge.
All the best.
Regards, Sai Krishna.