Training climbing roses

in Plants
so I recently bought a couple of climbing roses and have been reading about the training process. I gather that the main canes are the ones that just be trained at 45 degrees to horizontal to increase vertical growth/blooms.
Now my current issue is the identification of these ‘main canes’. It’s obvious if the canes arise from the bud union but the one I’ve got at the moment has these canes that arise from the bud union and then appears to stop abruptly - see white arrow (blind ended) and give rise to lots of branches on its side (pink arrows).

So would these pink arrow branches count as main cane or would they be considered as lateral cane? Given the ‘main cane’ that come from the bud union is actually blind ended does this mean I should just assume that cane itself is a goner?
Ive also read that all canes that arise from within a foot from the soil should be considered a main cane in which case these pink arrived shoots should technically be main canes? I’m so confused!
a few more pics to illustrate the situation

Now my current issue is the identification of these ‘main canes’. It’s obvious if the canes arise from the bud union but the one I’ve got at the moment has these canes that arise from the bud union and then appears to stop abruptly - see white arrow (blind ended) and give rise to lots of branches on its side (pink arrows).

So would these pink arrow branches count as main cane or would they be considered as lateral cane? Given the ‘main cane’ that come from the bud union is actually blind ended does this mean I should just assume that cane itself is a goner?
Ive also read that all canes that arise from within a foot from the soil should be considered a main cane in which case these pink arrived shoots should technically be main canes? I’m so confused!
a few more pics to illustrate the situation

0
Posts
..incidentally, you have a short cane there with canker... in fact the rose doesn't look that healthy generally.. but I would prune that out if it was mine.. in the 2nd picture it's just right of centre and mostly black... I would prune it back to the green shoot.. it also seems to have spread to the cane to the right of it but that's ok for now..
..some people use disinfectant wipes on their pruners after pruning canker to limit spread to other roses... I don't bother personally but I should...
I have to to say that the batch of roses I have received from DA this time have not been as good as the previous batches, in the sense that the roses have more leaves with black spots and rust. I have pruned those leaves with disease on and left the rest so far.
..that's a climbing Hybrid Tea which is capable of throwing up some thick canes... if yours is in a pot then this will limit its vigour.. but ordinarily it's a tall lanky rose that also has long laterals... I hope you will be able to cope with it.. it can take a year or two before it takes off..
..here's a photo from a rose acquaintance of mine, on his house wall, so you can see how it wants to grow - quite unruly - but I kept one much shorter than this on a wall.. and also as a rambler on wooden posts.. worry about all that much later... for now, just leave it develop...
https://www.helpmefind.com/rose/l.php?l=21.318110