Salaah

Trying to pronounce the letters correctly

Q: I would like in shaa Allah to ask about things I face during my salah as every time I wonder if they break my salah or not. Allah created me in a way that it is a bit difficult for me to say letter R. In normal life its not obvious, no one even notices it, even me, but when it comes to say rrrrrrrrrr then I cant do that, which means Bismillehirrahmanirrahim is a bit difficult for me to say, I loose the sound of R if I am in my relaxed state. I have to give real efforts in order to pronounce it. My efforts don’t help much, R is still not so clear and I feel I only lose concentration in salah. Do I have to be making efforts or can be relaxed, how important is to pronounce R clearly? It’s the way Allah created me, can I be relaxed in my salah in shaa Allah? Other things that I experience during salah: last H in bismillehirrahmanirrrahim doesn’t come as soft as needed from my throat, because I loos air already saying all other letters in this words, so if it comes a bit harder then must be, if its close to the other Ha, is it something that voids my salah or requires sajda-sawh? In siratalmustaqim, letter Ta is difficult for me to say real hard, as to say R takes me to open my mouth and then its inconvenient for me to pronounce Ta hard as it must be. I should try to pronounce it correct but would like to know if mistake in this letter breaks salah? If saying D in gayrilmehDubi softer then it must be break salah? As above, in bismillehirrahmanirrahim, I cant stay long in double R, so I feel that I say double R, but sometimes feel I was to fast, is it ok or voiding salah? I noticed, when I try to say second double R properly, and then I have no air enough to say H in Rrahim soft as needed. In subhanerabbiyelA’le its hard for me to make a pausa in Ain as I was taught. Is any of these mistakes above break salah, require to read it again or require sajda-sawh, could you please let me know?

Reciting alif instead of ain in سمع الله لمن حمده

Q:

1.Does it break namaaz if in Semi Allahu limen hemideh one pronounce Alif instead of Ain in Semia?

2.Does it break namaz if one adjusts this mistakes already being up from ruku, meaning in the position standing straight when you say Rabbana lakal hamd?

3.Is sajda-sawh required for that?

4. If one did this mistake in witr namaz and then adjusted it at the position of Rabbana lakal hemd, then decided to make sajda-sawh, but in last tashahud he recited also Allahuma Sali and Allahuma barik, is his witr valid in shaa Allah?

5. I may not understand it from question 4, so please kindly answer separate – is it allowed to read all duas in last tashahud if one is going to perform sajda-sawh?

Delaying the witr Salaah

Q: My question is about witr Salaah:

1. After performing Esha Sallah at 8.00pm, can I delay my Witr Salaah till 11.00 pm(my sleep time)?

2. Can I combine Tahajjad and witr at the above mentioned time?

3. What will be my last Salaah before I go to sleep, Tahajjad or witr?