pls tell me if i have got the concept rite

transcription has 3 steps:
initiation:
the rna polymerase binds at the specific site of the dna known as the promoter
the promoter is identified by an initiation factor called as the sigma factor
the rna polymerase along with the sigma factor bind with the promoter

elongation:
the rna polymerase unzips the dna to form a large loop
the rna polymerase uses ribonucleoside triphosphate as a substrate to polymerise the dna following the rule of complimentarity
the process of polymerisation continuos until the enzyme reaches the terminator gene

termination
the rna polymerase when it polymerase thr coding stand it syntheses rna from 5 prime to 3 prime direction
when the rna polymerase binds with the terminator gene which is facilitated by the rho factor
thr rna polymerase seperates from the dna and the nasant rna falls off
 

Yes, you have got the concept right. There are just two mistakes, first, in elongation section, in second point, instead of DNA there should be RNA, as RNA is polymerised in the process of transcription.
Secondly, in the termination section, in first point, you have used the term coding strand for the DNA strand that serve as template for the process of polymerisation of RNA. Actually, the DNA strand which is involved in transcription process is called non- coding strand. Basically, the concept behind using the term 'coding' and 'non-coding' strand is that, the strand of DNA which have the base sequence same as the RNA strand which is being synthesized, is called as coding strand, as it is the sequence of bases in RNA which actually codes for the proteins. While the other strand of DNA which is involved in the process of transcription and have sequence complementary to that of RNA, is called as non-coding strand.

Hope this helps :)