How should I pronounce 't' followed by 'the'?
This combination is really hard to me. This is an example:
Knowing what to check is just the start to process.
Can anyone help?
In many (most?) dialects in both the US and the UK, "just the" would in normal speech would be pronounced [ʤʌsðə] before a consonant, or [ʤʌsðiː] before a vowel. That is, the 't' would be elided.
It's quite normal to omit a sound in this and in similar combinations of words. It's called elision.