Suitable for septoplasty to fix my deviation?

There are many strategies to straighten a crooked nose. Septoplasty alone will probably not be sufficient and you would need full rhinoplasty. Also bear in mind that straightening a crooked nose is never guaranteed. Although surgeons may claim to know how to do it, you will likely have some residual asymmetry. But I think your nose could be improved and straightened to a worthwhile degree