When you do CCNA its very important you understand the theory very well and do lots of labs and if you have any questions ask from the lecturer then and there and get it cleared ,
Don't try to by heart and pass the exam no point in passing like that because you have to use your knowledge in production environment,
also remember to get a good job and good salary not only CCNA , you have to have Microsoft windows server knowledge and Linux stuff as well , more certifications you have better chance of getting a good job and good salary .
and if you are planning to go outside like Australia , USA , UK etc.. then you have to have a Computer degree also.
for all you CISCO studies CCNA R&S , Security , CCNP R&S , Service provider etc below mentioned place is very good.
CISLANKA Training Institute in wellawatte Colombo 6 opposite savoy film hall
You will get the theory and lab knowledge 100%
can do the labs using real equipment using ISR routers L2 , L3 switches etc..
course fee also low for CCNA Rs 16000/= but syllabus covered 100% with theory and lab
give them a call and see
0714466786